{"id":19190,"date":"2018-01-26T07:08:01","date_gmt":"2018-01-26T07:08:01","guid":{"rendered":"https:\/\/www.aplustopper.com\/?p=19190"},"modified":"2020-11-23T17:56:42","modified_gmt":"2020-11-23T12:26:42","slug":"frank-icse-solutions-class-9-physics-measurement","status":"publish","type":"post","link":"https:\/\/www.aplustopper.com\/frank-icse-solutions-class-9-physics-measurement\/","title":{"rendered":"Frank ICSE Solutions for Class 9 Physics &#8211; Measurement"},"content":{"rendered":"<h2><span style=\"color: #00ccff;\"><strong>Frank ICSE Solutions for Class 9 Physics &#8211; Measurement<\/strong><\/span><\/h2>\n<p><span style=\"color: #00ccff;\"><strong>PAGE NO: 15<\/strong><\/span><br \/>\n<span style=\"color: #eb4924;\"><strong>Solution 1:<\/strong><\/span><br \/>\nMeasurement is an act or the result of comparison of a quantity whose magnitude is unknown with a predefined standard.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 2:<\/strong><\/span><br \/>\nThe physical quantities like mass, length and time which do not depend on each other are known as fundamental quantities.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 3:<\/strong><\/span><br \/>\nLength, mass, time are the three fundamental quantities.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 4:<\/strong><\/span><br \/>\nUnit is a standard quantity of the same kind with which a physical quantity is compared for measuring it.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 5:<\/strong><\/span><br \/>\nA standard metreis equal to 1650763.73 wavelengths in vacuum, of the radiation from krypton isotope of mass 86.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 6:<\/strong><\/span><br \/>\nThree systems of unit are<\/p>\n<ul>\n<li><strong>C.G.S system<\/strong> &#8211; fundamental unit of length is centimetre(cm), of mass is gram(gm), of time is second(s).<\/li>\n<li><strong>F.P.S system<\/strong>&#8211; fundamental unit of length is foot(ft), of mass is pound(lb), of time is second(s).<\/li>\n<li><strong>M.K.S system<\/strong>&#8211; fundamental unit of length is metre(m), of mass is kilogram(kg), of time is second(s).<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 7:<\/strong><\/span><br \/>\nThe SI unit of mass is Kilogram. One standard kilogram is equal to the mass of a cylinder of nearly same height and diameter and made up of platinum and iridium alloy.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 8:<\/strong><\/span><br \/>\nThree units of length greater than a metre are<\/p>\n<ul>\n<li>Decameter = 10 metre<\/li>\n<li>Hectometer = 100 metre<\/li>\n<li>Kilometer = 1000 metre<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 9:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83398\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-1.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 1\" width=\"656\" height=\"227\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-1.png 656w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-1-300x104.png 300w\" sizes=\"(max-width: 656px) 100vw, 656px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 10:<\/strong><\/span><br \/>\nLight year is defined as the distance travelled by light in vacuum in one year.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 11:<\/strong><\/span><br \/>\nTwo units of length smaller than a metre are<\/p>\n<ul>\n<li>Decimeter = 0.1 metre<\/li>\n<li>Centimeter = 0.01 metre<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 12:<\/strong><\/span><br \/>\nLeap year because it is a unit of time.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 13:<\/strong><\/span><br \/>\nOrder of magnitude of a physical quantity is defined as its magnitude in powers of ten when that physical quantity is expressed in powers of ten with one digit towards the left decimal.<br \/>\nFor example, volume= 52.37 m<sup>3<\/sup> then the order of magnitude is 10<sup>2<\/sup>m<sup>3<\/sup>.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 14:<\/strong><\/span><br \/>\nNo, micron is not same as millimeter because micron is equal to 10<sup>-6<\/sup>metre while a millimeter is equal to 10<sup>-3<\/sup>metre.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 15:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83400\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-2.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 2\" width=\"190\" height=\"239\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 16:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83419\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-3.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 3\" width=\"292\" height=\"75\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 17:<\/strong><\/span><br \/>\nA leap year refers to a year in which February has 29 days and the total days in the year are 366 days.<\/p>\n<p><span style=\"color: #00ccff;\"><strong>PAGE NO: 16<\/strong><\/span><br \/>\n<span style=\"color: #eb4924;\"><strong>Solution 18:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83424\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-4.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 4\" width=\"255\" height=\"129\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 19:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83426\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-5.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 5\" width=\"359\" height=\"178\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-5.png 359w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-5-300x149.png 300w\" sizes=\"(max-width: 359px) 100vw, 359px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 20:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83427\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-6.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 6\" width=\"198\" height=\"174\" \/><\/p>\n<p><span style=\"color: #00ccff;\"><strong>PAGE NO: 28<\/strong><\/span><br \/>\n<span style=\"color: #eb4924;\"><strong>Solution 1:<\/strong><\/span><br \/>\nWhen one complete rotation is given to the screw hand, it moves forward or backward by a distance is called pitch of the screw. It is distance between two consecutive threads of the screw.<br \/>\nPitch of the screw = distance travelled by screw in n rotations\/n rotations<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 2:<\/strong><\/span><br \/>\nNo, least count is not same as pitch because least count is found by dividing pitch by number of divisions on the circular scale.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 3:<\/strong><\/span><br \/>\nTwo uses of vernier caliper are<\/p>\n<ul>\n<li>Measuring the internal diameter of a tube or a cylinder.<\/li>\n<li>Measuring the length of an object.<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 4:<\/strong><\/span><br \/>\nTwo limitations of metre rule<\/p>\n<ul>\n<li>There comes an error of parallax due to thickness of the metre rule.<\/li>\n<li>We cannot use metre rule for measuring small thickness.<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 5:<\/strong><\/span><br \/>\nWhen one complete rotation is given to the screw hand, it moves forward or backward by a distance called pitch of the screw. It is distance between two consecutive threads of the screw.<br \/>\nPitch of the screw = distance travelled by screw in n rotations\/n rotations<br \/>\nLeast count refers to the smallest reading that can be accurately measured while using an instrument. The least count is the value of one division on its scale.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 6:<\/strong><\/span><br \/>\nInitial level of water in cylinder = 30 ml<br \/>\nLevel of water in cylinder after immersing piece of copper = 50 ml<br \/>\nVolume of copper piece = 50-30 = 20 ml<\/p>\n<p><span style=\"color: #00ccff;\"><strong>PAGE NO: 29<\/strong><\/span><br \/>\n<span style=\"color: #eb4924;\"><strong>Solution 7:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83428\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-7.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 7\" width=\"458\" height=\"251\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-7.png 458w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-7-300x164.png 300w\" sizes=\"(max-width: 458px) 100vw, 458px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 8:<\/strong><\/span><br \/>\nThe ratchet is used in a screw gauge to hold the object under measurement gently between the studs.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 9:<\/strong><\/span><br \/>\nIf the zero of the circular scale does not coincide with the zero of the main scale (pitch scale), this is known as zero error. There are two types of zero error &#8211;<\/p>\n<ol>\n<li>If the zero of the circular scale remains below the line of graduation then it is called positive zero error<\/li>\n<li>If the zero of the circular scale lies above the line of graduation then it is called negative zero error<br \/>\nFor positive zero error correction, the zero error should always be subtracted from the observed reading<br \/>\nFor negative zero error correction, the zero error must be added to the observed reading.<\/li>\n<\/ol>\n<p><span style=\"color: #eb4924;\"><strong>Solution 10:<\/strong><\/span><br \/>\nTwo scales in a screw gauge are<\/p>\n<ul>\n<li>A linear scale called the main scale graduated in half millimeters<\/li>\n<li>A circular scale divided into 50 or 100 equal parts.<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 11:<\/strong><\/span><br \/>\nDue to constant use, there is space for the play of screw gauge but gradually this space increases with the use or wear and tear, so that when the screw is moved by rotating it in some direction, it slips in the nut and does not cover any linear distance for some rotation of the screw head. The error due to this is known as backlash error.<br \/>\nIt is avoided by turning the screw always in the same direction.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 12:<\/strong><\/span><br \/>\nFollowing procedure is used to measure the diameter of a wire<\/p>\n<ul>\n<li>Calculate the least count and zero error of the screw gauge.<\/li>\n<li>Place the wire in between the studs. Turn the ratchet clockwise so as to hold the wire gently in between the studs. Record the main scale reading.<\/li>\n<li>Now record the division of circular scale that coincides with the base line of main scale. This circular scale division multiplied by least count will give circular scale reading.<\/li>\n<li>The observed diameter is obtained by adding the circular scale reading to the main scale reading. Subtract the zero error if any, with its proper sign, from the observed diameter to get the true diameter.<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 13:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83429\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-8.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 8\" width=\"539\" height=\"435\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-8.png 539w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-8-300x242.png 300w\" sizes=\"(max-width: 539px) 100vw, 539px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 14:<\/strong><\/span><br \/>\nScrew gauge measures a small length to a high accuracy because it has the lowest least count among the given three instruments. And low least count means high accuracy<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 15:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83430\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-9.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 9\" width=\"318\" height=\"131\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-9.png 318w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-9-300x124.png 300w\" sizes=\"(max-width: 318px) 100vw, 318px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 16:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83431\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-10.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 10\" width=\"534\" height=\"169\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-10.png 534w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-10-300x95.png 300w\" sizes=\"(max-width: 534px) 100vw, 534px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 17:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83432\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-11.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 11\" width=\"515\" height=\"264\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-11.png 515w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-11-300x154.png 300w\" sizes=\"(max-width: 515px) 100vw, 515px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 18:<\/strong><\/span><br \/>\nIf the zero of the circular scale remains below the line of graduation then it is called positive zero error. When there is positive zero error, then the instrument reads more than the actual reading. Therefore in order to get the correct reading, the zero error should always be subtracted from the observed reading.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 19:<\/strong><\/span><br \/>\nPitch of the screw gauge = 0.5mm = 0.05 cm<br \/>\nCircular scale divisions = 100<br \/>\nLeast Count of screw gauge = pitch of the gauge\/circular scale divisions<br \/>\n= 0.05\/100<br \/>\n= 0.0005cm<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 20:<\/strong><\/span><br \/>\nIf the zero of the circular scale lies above the line of graduation then it is called negative zero error. When there is negative zero error, then the instrument reads less than the actual reading. Therefore in order to get the correct reading, the zero error should always be added to the observed reading.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 21:<\/strong><\/span><\/p>\n<ul>\n<li>False, because the accuracy is higher in case of screw gauge due to lower least count value of 0.01mm<\/li>\n<li>True<\/li>\n<li>False, because its least count is limited to 0.1 cm. thus this length can be measured with an instrument of least count of 0.001 cm i.e. screw gauge<\/li>\n<li>False, the ratchet is used to hold the object under measurement gently between the studs.<\/li>\n<li>True<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 22:<\/strong><\/span><br \/>\nThe space occupied by a body is known as its volume. SI unit of volume is cubic metre (m<sup>3<\/sup>)<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 23:<\/strong><\/span><br \/>\nThe space occupied by a body is known as its volume. SI unit of volume is cubic metre (m<sup>3<\/sup>)<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 24:<\/strong><\/span><br \/>\n1 m<sup>3<\/sup>\u00a0= 1000 litre<br \/>\n1 litre = 1\/1000 m<sup>3<\/sup><br \/>\n= 0.001 m<sup>3<\/sup><\/p>\n<p><span style=\"color: #00ccff;\"><strong>PAGE NO: 30<\/strong><\/span><br \/>\n<span style=\"color: #eb4924;\"><strong>Solution 25:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83433\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-12.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 12\" width=\"589\" height=\"489\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-12.png 589w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-12-300x249.png 300w\" sizes=\"(max-width: 589px) 100vw, 589px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 26:<\/strong><\/span><br \/>\nSI unit of volume is cubic metre or metre<sup>3<\/sup> (m<sup>3<\/sup>).<br \/>\nThe relation between liter and metre<sup>3<\/sup><br \/>\n1 metre<sup>3<\/sup> = 1000 liter<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 27:<\/strong><\/span><br \/>\nPitch of the screw = 0.5 mm<br \/>\nLeast count = 0.001 mm<br \/>\nNumber of divisions = pitch\/least count<br \/>\n= 0.5\/0.001<br \/>\n= 500<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 28:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83435\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-13.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 13\" width=\"603\" height=\"480\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-13.png 603w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-13-300x239.png 300w\" sizes=\"(max-width: 603px) 100vw, 603px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 29:<\/strong><\/span><br \/>\nPrecautions to be taken while measuring volume of a solid lighter than water using displacement method<\/p>\n<ul>\n<li>The sinker should be insoluble in water<\/li>\n<li>The sinker should have a high density than water.<\/li>\n<li>Lower meniscus should be read to note down the readings and error due to parallax should be avoided.<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 30:<\/strong><\/span><br \/>\nMeasurement of volume of an irregular solid soluble in water using a graduated cylinder.<\/p>\n<ul>\n<li>In this case, kerosene or any liquid whose density is lighter than water and in which the solid is not soluble is used.<\/li>\n<li>Fill the graduated cylinder with the liquid.<\/li>\n<li>Record the lower meniscus of liquid and let the value be V<sub>1<\/sub>.<\/li>\n<li>Tie the solid whose volume is to be measured to a strong string and lower it into the water gently.<\/li>\n<li>Note the reading carefully and let the value be V<sub>2<\/sub><\/li>\n<li>Volume of the solid, V = V<sub>2<\/sub> &#8211; V<sub>1<\/sub><\/li>\n<\/ul>\n<p><span style=\"color: #00ccff;\"><strong>PAGE NO: 38<\/strong><\/span><br \/>\n<span style=\"color: #eb4924;\"><strong>Solution 1:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83436\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-14.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 14\" width=\"590\" height=\"358\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-14.png 590w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-14-300x182.png 300w\" sizes=\"(max-width: 590px) 100vw, 590px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 2:<\/strong><\/span><br \/>\nA seconds pendulum is a pendulum which takes 2 seconds to complete one oscillation. The length of seconds pendulum, where g = 9.8ms<sup>-2<\/sup>, is nearly 1 m.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 3:<\/strong><\/span><br \/>\nA stopwatch is used to measure short intervals of time.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 4:<\/strong><\/span><br \/>\nSI unit of frequency is hertz (Hz).<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 5:<\/strong><\/span><br \/>\nWhen a pendulum completes one oscillation in one second, then the frequency is one hertz.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 6:<\/strong><\/span><br \/>\nThe time period, T and frequency of oscillation, f are related as,<br \/>\nT = 1\/f or f = 1\/T<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 7:<\/strong><\/span><br \/>\nOne complete to and fro motion of a pendulum about its mean position is known as oscillation. Amplitude is the magnitude of the maximum displacement of the bob from the mean position on either side when an oscillation takes place.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 8:<\/strong><\/span><br \/>\nSI unit of amplitude is metre (m).<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 9:<\/strong><\/span><br \/>\nA seconds pendulum is a pendulum which takes 2 seconds to complete one oscillation. The length of seconds pendulum, where g = 9.8ms<sup>-2<\/sup>, is nearly 1 m.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 10:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83437\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-15.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 15\" width=\"228\" height=\"251\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 11:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83438\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-16.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 16\" width=\"604\" height=\"70\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-16.png 604w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-16-300x35.png 300w\" sizes=\"(max-width: 604px) 100vw, 604px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 12:<\/strong><\/span><br \/>\nWhen a pendulum is taken from earth to moon surface, its time period will increase because the acceleration due to gravity on moon is less than that on earth and the time period depends inversely on square root of acceleration due to gravity.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 13:<\/strong><\/span><br \/>\nIf time period of a pendulum becomes infinite, the pendulum will not oscillate at all as pendulum will take infinite time to complete one oscillation.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 14:<\/strong><\/span><br \/>\nEffective length of a simple pendulum is the distance of the point of oscillation (i.e. the centre of the gravity of bob) from the point of suspension.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 15:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83439\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-17.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 17\" width=\"590\" height=\"297\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-17.png 590w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-17-300x151.png 300w\" sizes=\"(max-width: 590px) 100vw, 590px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 16:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83440\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-18.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 18\" width=\"611\" height=\"263\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-18.png 611w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-18-300x129.png 300w\" sizes=\"(max-width: 611px) 100vw, 611px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 17:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83441\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-19.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 19\" width=\"284\" height=\"439\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-19.png 284w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-19-194x300.png 194w\" sizes=\"(max-width: 284px) 100vw, 284px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 18:<\/strong><\/span><br \/>\nThe time period of a pendulum is independent of mass of the bob.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 19:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83453\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-20.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 20\" width=\"123\" height=\"218\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 20:<\/strong><\/span><br \/>\nThe quantity of matter contained Mass of a body can be measured by using a beam balance. in a body is called its mass. Mass is always constant for a given body.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 21:<\/strong><\/span><br \/>\nA beam balance works on the principle of moments. According to the principle of moments, under equilibrium condition, the clockwise moment due to the body on one side of beam equals the anti clockwise moment due to standard weights on the other side of beam.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 22:<\/strong><\/span><br \/>\nPrecautions to be taken to measure the mass of a body using beam balance are<\/p>\n<ul>\n<li>The beam must be gently lowered before adding or removing weights from the pan.<\/li>\n<li>The weights should not be carried with bare hands to avoid the change in weights due to moisture and dust particles from the surrounding.<\/li>\n<li>The lever should be turned gently, in order to prevent knife edges from chipping.<\/li>\n<li>Never keep the wet or hot objects on the pan.<\/li>\n<li>The weights should be placed into weight box after use.<\/li>\n<li>Whenever you are near the actual weight, you should carefully try the weights in the descending order.<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 23:<\/strong><\/span><br \/>\nSI units of time and mass are second (s) and kilogram (kg) respectively.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 24:<\/strong><\/span><br \/>\nConditions for a beam balance to be true are<\/p>\n<ul>\n<li>Both the pans must be of equal weights.<\/li>\n<li>Both the arms must be of equal lengths.<\/li>\n<\/ul>\n<p><span style=\"color: #00ccff;\"><strong>PAGE NO: 44<\/strong><\/span><br \/>\n<span style=\"color: #eb4924;\"><strong>Solution 1:<\/strong><\/span><br \/>\nLeast count of an instrument refers to the smallest reading that can be accurately measured while using the instrument. For an instrument provided with a scale the least count is the value of one division on its scale.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 2:<\/strong><\/span><br \/>\nMaximum possible error is 0.1 cm.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 3:<\/strong><\/span><br \/>\nSlope of a graph indentifies the proportional relationship between the quantities plotted.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 4:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83454\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-21.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 21\" width=\"219\" height=\"126\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 5:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83456\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-22.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 22\" width=\"224\" height=\"121\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 6:<\/strong><\/span><br \/>\nAccuracy is the extent to which a reported measurement approaches the true value of the quantity measured. This extent is usually described by the least count of the instrument and since the least count for a given instrument is limited hence, the accuracy of the instrument is limited.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 7:<\/strong><\/span><br \/>\nTwo types of error in a measurement are<\/p>\n<ul>\n<li><strong>Random errors<\/strong>-these errors are due to various factors. In a number of observations we get different readings every time.<br \/>\nThese errors can be minimized by taking observations a large number of times and taking the arithmetic mean of the readings.<\/li>\n<li><strong>Gross error<\/strong>&#8211; these errors are due to carelessness of the observer like parallax, improper setting of the instrument.<br \/>\nThese errors can be minimized only when the observer is careful in setting up of instrument and taking readings.<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 8:<\/strong><\/span><br \/>\n3000g is the most accurate measurement because it has maximum number of significant figures = 4.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 9:<\/strong><\/span><br \/>\nBasically there is no difference between the quantity being measured but there is a difference of significant figures in the measurement.<\/p>\n<ol>\n<li>Number of significant figures = 3<\/li>\n<li>Number of significant figures = 4<\/li>\n<li>Number of significant figures = 5<br \/>\nSince (3) part has maximum number of significant figures = 5, therefore it is most accurate among the given three.<\/li>\n<\/ol>\n<p><span style=\"color: #00ccff;\"><strong>PAGE NO: 46<\/strong><\/span><br \/>\n<span style=\"color: #eb4924;\"><strong>Solution 1:<\/strong><\/span><br \/>\nUnit is a standard quantity of the same kind with which a physical quantity is compared for measuring it.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 2:<\/strong><\/span><br \/>\nThe units which can neither be derived from one another, nor can they be further resolved into other units are known as fundamental units.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 3:<\/strong><\/span><br \/>\nThe units which can be expressed in terms of fundamental units of mass, length and time are known as derived units.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 4:<\/strong><\/span><br \/>\nA standard metre is equal to 1650763.31 wavelengths in vacuum, of the radiation from krypton isotope of mass 86.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 5:<\/strong><\/span><br \/>\nOne standard kilogram is equal to the mass of a cylinder of nearly same height and diameter and made up of platinum and iridium alloy.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 6:<\/strong><\/span><br \/>\nSI unit of electric current is Ampere (A).<\/p>\n<p><span style=\"color: #00ccff;\"><strong>PAGE NO: 47<\/strong><\/span><br \/>\n<span style=\"color: #eb4924;\"><strong>Solution 7:<\/strong><\/span><br \/>\nLight year is defined as the distance travelled by light in vacuum in one year.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 8:<\/strong><\/span><br \/>\n1 Parsec is bigger because 1 Parsec is 3.26 times a light year.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 9:<\/strong><\/span><br \/>\n1 Fermi is smaller because 1 Fermi is 10<sup>-15<\/sup> m while 1 micron is 10<sup>-6<\/sup> m.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 10:<\/strong><\/span><br \/>\nParsec refers to the distance at which an arc of length equal to 1 astronomical unit subtends an angle of one second at a point.<br \/>\nNo, parsec is not same as astronomical unit (A.U.).<br \/>\n1 Parsec = 2 x 10<sup>5<\/sup> A.U.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 11:<\/strong><\/span><br \/>\nLeast count of a vernier caliper used in laboratory is 0.1mm = 0.01cm<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 12:<\/strong><\/span><br \/>\nVernier caliper is an instrument used for measuring small lengths of solid objects where an ordinary scale cannot be applied. We can measure the length accurately up to the order of 10<sup>-2<\/sup> cm, 10<sup>-3<\/sup> cm depending upon the vernier used. Therefore a vernier caliper is important to measure the fraction of a smallest division of a measuring scale which otherwise could not be done by the judgment of the eye.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 13:<\/strong><\/span><br \/>\nLeast count of an instrument refers to the smallest reading that can be accurately measured while using the instrument. For an instrument provided with a scale the least count is the value of one division on its scale.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 14:<\/strong><\/span><br \/>\nNo, we cannot measure the thickness of a paper with vernier caliper as its least count is only 0.1mm. We should use screw gauge instead as its least count is 0.01 mm as the thickness of the paper is in the range of 10<sup>-2<\/sup> mm.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 15:<\/strong><\/span><br \/>\nIf the zero of the one scale (vernier scale or circular scale of screw gauge) does not coincide with the zero of the main scale, this is known as zero scale, zero error arises. There are two types of zero error &#8211;<\/p>\n<ul>\n<li>If the zero of the scale remains below the line of graduation of the main scale then it is called positive zero error<\/li>\n<li>If the zero of the scale lies above the line of graduation of the main scale then it is called negative zero error<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 16:<\/strong><\/span><br \/>\nScrew gauge consists essentially of a screw with a uniform pitch which moves in a nut, thus it is named as screw gauge because the major working part is a screw.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 17:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83457\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-23.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 23\" width=\"581\" height=\"188\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-23.png 581w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-23-300x97.png 300w\" sizes=\"(max-width: 581px) 100vw, 581px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 18:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83458\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-24.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 24\" width=\"581\" height=\"188\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-24.png 581w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-24-300x97.png 300w\" sizes=\"(max-width: 581px) 100vw, 581px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 19:<\/strong><\/span><br \/>\nMaterial used for making screw gauge is stainless steel to avoid expansion and contraction due to change in weather as stainless steel absorbs a little heat.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 20:<\/strong><\/span><br \/>\nWhen one complete rotation is given to the screw hand, it moves forward or backward by a distance is called pitch of the screw. It is distance between two consecutive threads of the screw.<br \/>\nPitch of the screw = distance traveled by screw in n rotations\/n rotations<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 21:<\/strong><\/span><br \/>\nIf the zero of the circular scale lies above the line of graduation then it is called negative zero error. When there is negative zero error, then the instrument reads less than the actual reading. Therefore in order to get the correct reading, the zero error should always be added from the observed reading.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 22:<\/strong><\/span><br \/>\nDue to constant use, there is space for the play of screw gauge but gradually this space increases with the use or wear and tear, so that when the screw is moved by rotating it in some direction, it slips in the nut and does not cover any linear distance for some rotation of the screw head. The error due to this is known as backlash error.<br \/>\nIt is avoided by turning the screw always in the same direction.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 23:<\/strong><\/span><br \/>\nA screw are threaded to twist in, when turned with a screw driver while nails are smooth to slide in straight when pounded with hammer.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 24:<\/strong><\/span><br \/>\nScrew has two types of motions: linear and circular motions.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 25:<\/strong><\/span><br \/>\nUnit of Least count of an instrument is cm.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 26:<\/strong><\/span><br \/>\n1 micron = 10<sup>-6<\/sup> m.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 27:<\/strong><\/span><br \/>\nA physical balance works on the principle of moments. According to the principle of moments, under equilibrium condition, the clockwise moment due to the body on one side of beam equals the anti clockwise moment due to standard weights on the other side of beam.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 28:<\/strong><\/span><br \/>\n1 light year = 9.46 x 10<sup>15<\/sup> m<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 29:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83460\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-25.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 25\" width=\"435\" height=\"369\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-25.png 435w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-25-300x254.png 300w\" sizes=\"(max-width: 435px) 100vw, 435px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 30:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83461\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-26.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 26\" width=\"331\" height=\"330\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-26.png 331w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-26-150x150.png 150w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-26-300x300.png 300w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-26-100x100.png 100w\" sizes=\"(max-width: 331px) 100vw, 331px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 31:<\/strong><\/span><br \/>\nYes, the vibration is same as the oscillation.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 32:<\/strong><\/span><br \/>\nThe time period, T and frequency of oscillation, f are related as,<br \/>\nT = 1\/ for f = 1\/T<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 33:<\/strong><\/span><br \/>\nAn ideal pendulum is a simple pendulum consists a heavy mass (called the bob) considered as a point mass suspended by a thread which is considered to be mass less and inextensible or non-elastic, from a fixed point or rigid support and in which there is no friction between the support and the string.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 34:<\/strong><\/span><br \/>\nWall clock with a pendulum will run at a faster rate in winter as it pendulum rod get shorter and the pendulum will swing at a faster rate thus the clock would run faster in winters.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 35:<\/strong><\/span><br \/>\nMeasurement is needed for precise description of any phenomenon happening in the world. For example, if a body is freely falling down to the ground, to understand this phenomenon we must know its velocity, time it will take to reach the ground , etc and to get answer to all our questions we need measurement.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 36:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83462\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-27.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 27\" width=\"657\" height=\"136\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-27.png 657w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-27-300x62.png 300w\" sizes=\"(max-width: 657px) 100vw, 657px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 37:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83473\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-28.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 28\" width=\"326\" height=\"193\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-28.png 326w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-28-300x178.png 300w\" sizes=\"(max-width: 326px) 100vw, 326px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 38:<\/strong><\/span><br \/>\nThe maintenance of standard units is essential because any variation in these standards would lead to wrong measurements, misleading results and confusing generalizations. The standards are preserved in such a way that they do not undergo any change with the change in temperature, pressure, humidity and other environmental changes.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 39:<\/strong><\/span><br \/>\nMain characteristics of a standard unit are as follows<\/p>\n<ul>\n<li>It must be well defined.<\/li>\n<li>It must be of proper size. Very small or large size may cause inconvenience.<\/li>\n<li>It should be easily accessible<\/li>\n<li>It must be reproducible at all places without any difficulty.<\/li>\n<li>It must be accurately defined and must not change with time, place and physical conditions such as pressure, humidity, etc.<\/li>\n<li>It must be widely acceptable all over the world.<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 40:<\/strong><\/span><br \/>\nThe units which can neither be derived from one another, nor can they be further resolved into other units are known as fundamental units. Some of the fundamental units are metre (length), kilogram (mass), second (time), Kelvin (temperature), ampere (current), etc.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 41:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83483\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-29.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 29\" width=\"542\" height=\"643\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-29.png 542w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-29-253x300.png 253w\" sizes=\"(max-width: 542px) 100vw, 542px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 42:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83484\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-30.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 30\" width=\"429\" height=\"166\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-30.png 429w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-30-300x116.png 300w\" sizes=\"(max-width: 429px) 100vw, 429px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 43:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83486\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-31.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 31\" width=\"246\" height=\"257\" \/><\/p>\n<p><span style=\"color: #00ccff;\"><strong>PAGE NO: 48<\/strong><\/span><br \/>\n<span style=\"color: #eb4924;\"><strong>Solution 44:<\/strong><\/span><br \/>\nIf the zero of the circular scale does not coincide with the zero of the main scale (pitch scale) when the end of the movable screw is brought in contact with the fixed end then the screw gauge is said to have a zero error.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 45:<\/strong><\/span><br \/>\nIn this case, the zero error is positive<br \/>\nLeast count of screw gauge = 0.01 mm<br \/>\nThus, zero error = 0 + 4 x L.C. = 0.04 mm<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 46:<\/strong><\/span><br \/>\nIn this case, the zero error is negative<br \/>\nLeast count of screw gauge = 0.01 mm<br \/>\nThus, zero error = (50-47) x L.C.<br \/>\n= 3 x 0.01<br \/>\n= 0.03 mm<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 47:<\/strong><\/span><br \/>\nNo, we cannot measure the diameter of a wire by wrapping it around a pencil because it is not very accurate. We can use screw gauge for this purpose as it can measure the diameter correct up to 1\/100 of millimeter or even less.<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 48:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83487\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-32.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 32\" width=\"469\" height=\"599\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-32.png 469w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-32-235x300.png 235w\" sizes=\"(max-width: 469px) 100vw, 469px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 49:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83488\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-33.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 33\" width=\"588\" height=\"605\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-33.png 588w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-33-292x300.png 292w\" sizes=\"(max-width: 588px) 100vw, 588px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 50:<\/strong><\/span><br \/>\nNumber of threads =20<br \/>\nDistance covered in 20 threads = 10 mm<br \/>\nPitch of the screw gauge = 10\/20 =0.5 mm<br \/>\nNo of divisions on circular scale = 50<br \/>\nLeast count = pitch\/no of divisions = 0.01 mm<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 51:<\/strong><\/span><\/p>\n<ul>\n<li><strong>Oscillation<\/strong> &#8211; One complete to and fro motion of a pendulum about its mean position is known as oscillation.<\/li>\n<li><strong>Time period<\/strong> &#8211; The time taken by a simple pendulum for an oscillation is known as the time period of a simple pendulum.<\/li>\n<li><strong>Frequency<\/strong> -the number of oscillation made by the pendulum in one second is called frequency. Its SI unit is Hertz (Hz).<\/li>\n<li><strong>Amplitude<\/strong> &#8211; Amplitude is the magnitude of the maximum deviation of the bob from the mean position on either side when an oscillation takes place.<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 52:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83489\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-34.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 34\" width=\"604\" height=\"578\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-34.png 604w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-34-300x287.png 300w\" sizes=\"(max-width: 604px) 100vw, 604px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 53:<\/strong><\/span><br \/>\nMass of the metal = 540g<br \/>\nVolume = 200cm<sup>3<\/sup><br \/>\nDensity = mass of metal\/ volume<br \/>\n= 540 \/200 = 2.70 g\/cm<sup>3<\/sup><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 54:<\/strong><\/span><br \/>\nMass of copper = 540 g<br \/>\nDensity of copper = 9 g\/cm<sup>3<\/sup><br \/>\nVolume of copper used in the alloy = mass of copper \/ density<br \/>\n= 540\/9 = 60 cm<sup>3<\/sup><br \/>\nMass of iron = 240 g<br \/>\nDensity of iron = 8 g\/cm<sup>3<\/sup><br \/>\nVolume of iron used in the alloy = mass of iron \/ density<br \/>\n= 240\/8 = 30 cm<sup>3<\/sup><br \/>\nTotal mass of the alloy = 540 + 240 = 780 g<br \/>\nTotal volume of the alloy = 60 + 30 = 90<br \/>\nDensity of the alloy = mass of the alloy \/ density of the alloy<br \/>\n= 780 \/ 90 = 8.67 g\/cm<sup>3<\/sup><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 55:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83491\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-35.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 35\" width=\"422\" height=\"797\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-35.png 422w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-35-159x300.png 159w\" sizes=\"(max-width: 422px) 100vw, 422px\" \/><\/p>\n<p><span style=\"color: #00ccff;\"><strong>PAGE NO : 49<\/strong><\/span><br \/>\n<span style=\"color: #eb4924;\"><strong>Solution 56:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83492\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-36.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 36\" width=\"586\" height=\"358\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-36.png 586w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-36-300x183.png 300w\" sizes=\"(max-width: 586px) 100vw, 586px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 57:<\/strong><\/span><br \/>\nFor measuring the length of an object using a vernier calipers, these steps are followed:<\/p>\n<ul>\n<li>First of all we find the least count and zero error of the vernier calipers.<\/li>\n<li>Place the object whose length is to be measured below the lower jaws and move the jaw till it touches the object. Record the main reading.<\/li>\n<li>Note the division on the vernier scale that coincides with some division of the main scale. Multiply this number of vernier division with least count. This is vernier scale reading.<\/li>\n<li>Record the observed length by adding the main scale reading and the vernier scale reading. Also, subtract zero error with its proper sign, if any, from the observed length to find the true length of the object.<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 58:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83514\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-37.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 37\" width=\"591\" height=\"594\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-37.png 591w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-37-150x150.png 150w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-37-298x300.png 298w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-37-100x100.png 100w\" sizes=\"(max-width: 591px) 100vw, 591px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 59:<\/strong><\/span><br \/>\nFollowing procedure is used to measure the diameter of a wire<\/p>\n<ul>\n<li>Calculate the least count and zero error of the screw gauge.<\/li>\n<li>Place the wire in between the studs. Turn the ratchet clockwise so as to hold the wire gently in between the studs. Record the main scale reading.<\/li>\n<li>Now record the division of circular scale that coincides with the base line of main scale. This circular scale division multiplied by least count will give circular scale reading.<\/li>\n<li>The observed diameter is obtained by adding the circular scale reading to the main scale reading. Subtract the zero error if any, with its proper sign, from the observed diameter to get the true diameter.<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 60:<\/strong><\/span><br \/>\nIn order to measure the length of an object using a metre rule, the metre rule must be placed with its marking close to the object, such that the zero marking on the scale coincides with one end of the object. Then the reading on the scale corresponding to the other end of the object will give the length of the object.<br \/>\nPrecautions to be taken for measuring the length of the object, the eye must be kept vertically above the end of the object to avoid parallax and the corresponding marking along the line should be carefully read.<br \/>\nThe meter scale can measure up to an accuracy of 1mm or 0.1 cm<\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 61:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83559\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-38.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 38\" width=\"586\" height=\"399\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-38.png 586w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-38-300x204.png 300w\" sizes=\"(max-width: 586px) 100vw, 586px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 62:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83567\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-39.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 39\" width=\"581\" height=\"399\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-39.png 581w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-39-300x206.png 300w\" sizes=\"(max-width: 581px) 100vw, 581px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 63:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83570\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-40.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 40\" width=\"571\" height=\"274\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-40.png 571w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-40-300x144.png 300w\" sizes=\"(max-width: 571px) 100vw, 571px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 64:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83571\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-41.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 41\" width=\"671\" height=\"323\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-41.png 671w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-41-300x144.png 300w\" sizes=\"(max-width: 671px) 100vw, 671px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 65:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83572\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-42.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 42\" width=\"521\" height=\"150\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-42.png 521w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-42-300x86.png 300w\" sizes=\"(max-width: 521px) 100vw, 521px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 66:<\/strong><\/span><\/p>\n<ul>\n<li><strong>Oscillation<\/strong> &#8211; One complete to and fro motion of a pendulum about its mean position is known as oscillation.<\/li>\n<li><strong>Amplitude<\/strong> &#8211; Amplitude is the magnitude of the maximum deviation of the bob from the mean position on either side when an oscillation takes place.<\/li>\n<li><strong>Frequency<\/strong> &#8211; the number of oscillation made by the pendulum in one second is called frequency. Its SI unit is Hertz (Hz).<\/li>\n<li><strong>Time period<\/strong> &#8211; The time taken by a simple pendulum for an oscillation is known as the time period of a simple pendulum.<\/li>\n<\/ul>\n<p><span style=\"color: #eb4924;\"><strong>Solution 67:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83573\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-43.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 43\" width=\"441\" height=\"460\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-43.png 441w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-43-288x300.png 288w\" sizes=\"(max-width: 441px) 100vw, 441px\" \/><\/p>\n<p><span style=\"color: #00ccff;\"><strong>PAGE NO: 50<\/strong><\/span><br \/>\n<span style=\"color: #eb4924;\"><strong>Solution 68:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83594\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-44.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 44\" width=\"600\" height=\"280\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-44.png 600w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-44-300x140.png 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p><span style=\"color: #eb4924;\"><strong>Solution 69:<\/strong><\/span><br \/>\nTo measure mass of a body using a physical balance<\/p>\n<ol>\n<li>Before starting, bring the plumb line just above the pointed projection by adjusting the leveling screws at the base. The beam is then gently raised using the lever. And it should be ensured that the pointer swings equally on both sides of the zero mark of the scale.<\/li>\n<li>Now lower the beam gently and given body is kept on left pan.<\/li>\n<li>Next, place some weight on the right pan form the weight box using the forceps.<\/li>\n<li>Now the lever is turned towards right so that the beam rises and the power begins to swing to pointer swing on either side. It must be carefully noted that the side to which the pointer moves more, denotes lesser mass on that side.<\/li>\n<li>Go on adjusting the standard weights till the pointer swings equally on both sides of the zero mark.<\/li>\n<li>At this stage, the total mass of weights on the right pan gives the mass of the body.<br \/>\nThree precautions to be taken to measure the mass of a body using beam balance are<\/p>\n<ul>\n<li>The beam must be gently lowered before adding or removing weights from the pan.<\/li>\n<li>The weights should not be carried with bare hands to avoid the change in weights due to moisture and dust particles from the surrounding<\/li>\n<li>Whenever you are near the actual weight, you should carefully try the weights in the descending order.<br \/>\nConditions for a beam balance to be true are<\/li>\n<\/ul>\n<\/li>\n<li>Both the pans must be of equal weights.<\/li>\n<li>Both the arms must be of equal lengths.<\/li>\n<\/ol>\n<p><span style=\"color: #eb4924;\"><strong>Solution 70:<\/strong><\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-83595\" src=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-45.png\" alt=\"Frank ICSE Solutions for Class 9 Physics - Measurement 45\" width=\"650\" height=\"275\" srcset=\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-45.png 650w, https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/01\/Frank-ICSE-Solutions-for-Class-9-Physics-Measurement-45-300x127.png 300w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/><\/p>\n<p><a class=\"button-red\" title=\"FRANK ICSE Class 9 Physics Solutions\" href=\"https:\/\/www.aplustopper.com\/frank-icse-solutions-class-9-physics\/\">Physics<\/a><a class=\"button-blue\" title=\"FRANK ICSE Class 9 Chemistry Solutions\" href=\"https:\/\/www.aplustopper.com\/frank-icse-solutions-class-9-chemistry\/\">Chemistry<\/a><a class=\"button-blue\" title=\"FRANK ICSE Class 9 Biology Solutions\" href=\"https:\/\/www.aplustopper.com\/frank-icse-solutions-class-9-biology\/\">Biology<\/a><a class=\"button-blue\" title=\"FRANK ICSE Class 9 Maths Solutions\" href=\"https:\/\/www.aplustopper.com\/frank-icse-solutions-class-9-maths\/\">Maths<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Frank ICSE Solutions for Class 9 Physics &#8211; Measurement PAGE NO: 15 Solution 1: Measurement is an act or the result of comparison of a quantity whose magnitude is unknown with a predefined standard. Solution 2: The physical quantities like mass, length and time which do not depend on each other are known as fundamental [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[6442,3034,404],"tags":[6813,6840,6837,6835,6824,6839,6838,6811,6836],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v17.8 (Yoast SEO v17.8) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Frank ICSE Solutions for Class 9 Physics - Measurement - A Plus Topper<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.aplustopper.com\/frank-icse-solutions-class-9-physics-measurement\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Frank ICSE Solutions for Class 9 Physics - Measurement\" \/>\n<meta property=\"og:description\" content=\"Frank ICSE Solutions for Class 9 Physics &#8211; Measurement PAGE NO: 15 Solution 1: Measurement is an act or the result of comparison of a quantity whose magnitude is unknown with a predefined standard. 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