{"id":7637,"date":"2024-02-23T07:42:50","date_gmt":"2024-02-23T02:12:50","guid":{"rendered":"https:\/\/www.aplustopper.com\/?p=7637"},"modified":"2024-02-23T15:56:02","modified_gmt":"2024-02-23T10:26:02","slug":"thermionic-emission-radio-activity-icse-solutions-for-class-10-physics","status":"publish","type":"post","link":"https:\/\/www.aplustopper.com\/thermionic-emission-radio-activity-icse-solutions-for-class-10-physics\/","title":{"rendered":"ICSE Solutions for Class 10 Physics – Thermionic Emission and Radioactivity"},"content":{"rendered":"

ICSE Solutions for Class 10 Physics – Thermionic Emission and Radioactivity<\/strong><\/span><\/h2>\n

ICSE Solutions<\/a>Selina ICSE Solutions<\/a><\/p>\n

APlusTopper.com provides ICSE Solutions for Class 10 Physics Chapter 11 Thermionic Emission and Radioactivity for ICSE Board Examinations. We provide step by step Solutions for ICSE Physics Class 10 Solutions Pdf.\u00a0You can download the Class 10 Physics ICSE Textbook Solutions with Free PDF download option.<\/p>\n

Download Formulae Handbook For ICSE Class 9 and 10<\/a><\/p>\n

Short Answers<\/strong><\/span><\/h3>\n

Question 1:<\/strong> Define bound electrons.
\nAnswer:<\/strong> As nucleus is positively charged it strongly attracts the negative charged electrons. The electron orbit close to the nucleus are tightly bound by strong attractive force of nucleus. These electrons are known as bound electrons.<\/p>\n

Question 2:<\/strong> Define free electrons.
\nAnswer:<\/strong> Electrons in outer orbits are weakly bound with the nucleus. In solids these weakly bound electrons leave their individual atom and become a part of it. These electrons are known as free electrons.<\/p>\n

Question 3:<\/strong> Define atomic number of an element.
\nAnswer:<\/strong> The number of protons in the nucleus is known as the atomic number of the element and is denoted by Z.<\/p>\n

Question 4:<\/strong> Define mass number of an element.
\nAnswer:<\/strong> The total number of neutrons and protons in the nucleus is called the mass number of the element and is denoted by A.<\/p>\n

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Question 5:<\/strong> What are isotopes<\/a>? Give examples.
\nAnswer:<\/strong> The atoms of same element which have same atomic number but different mass number are called isotopes. Examples: Protium, Deuterium, Tritium.<\/p>\n

Question 6:<\/strong> What are isobars<\/a>? Give examples.
\nAnswer:<\/strong> The atoms of different elements which have the, same mass number but differ in their atomic numbers are called isobars.
\nExamples: Sodium, Magnesium.<\/p>\n

Question<\/strong> 7:<\/strong> What do you mean by electron emission?
\nAnswer:<\/strong> Free electrons leave the metal surface only if sufficient energy is supplied to the metal. This emission of electrons from metal surface is called the electron emission.<\/p>\n

Question 8:<\/strong> What are the types of emission?
\nAnswer:<\/strong> There are four types of emissions:
\n(i) Thermionic emission. (ii) Photoelectric emission.
\n(iii) Field emission. (iv) Secondary emission.<\/p>\n

Question 9:<\/strong> What do you mean by thermionic emission?
\nAnswer:<\/strong> The emission of free electrons from a metal surface, when heat energy is imparted to it, is called thermionic emission.<\/p>\n