What is the Relationship between Electric Current and Potential Difference?When an electric charge is placed at a point in an electric field, it experiences an electric force acting on it. Work is required to move the electric charge in the electric field against this force. This charge is said to have an electric potential at that point. Figure shows two points, A and … [Read more...] about What is the Relationship between Electric Current and Potential Difference?
Magnetic Effect Of Electric Current You know that magnets can attract certain substances such as iron. So far, you have studied about electricity and magnetism separately. However, did you know that electricity and magnetism are closely related? Perform the following activity to understand this. Activity Aim: To see the magnetic effect of current passing through a wire … [Read more...] about What Is Magnetic Effect Of Electric Current
Heating Effect Of Electric Current Try touching a torch bulb that is lit and another that is not. Be careful when you touch the lit bulb. Do you feel it is hot to touch? Why do you think it is so?In a bulb, an electric current passes through a very thin wire made of a special material (such as tungsten) called the filament. When the bulb is switched on, the filament gets … [Read more...] about What Is Heating Effect Of Electric Current
What is Electric Current Electric Charge and Electric CurrentWhat is an electric charge? Objects that exert electric forces are said to have electric charges. Electric charge is the source of electrical force. There are two types of electrical charges, positive (+) and negative (-). Two like charges (+ and + or - and -) repel each other. Two unlike charges (+ and -) … [Read more...] about What is Electric Current