Table of Contents
Charging of Insulators
Since charge cannot flow through insulators, neither conduction nor induction can be used to charge, insulators, so in order to charge an insulator friction is used. Whenever an insulator is rubbed against a body exchange of electrons takes place between the two. This results in appearance of equal and opposite charges on the insulator and the other body. Thus the insulator is charged.
For example rubbing of plastic with fur, silk with glass causes charging of these things.
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COULOMB’S LAW
Last modified on:3 years agoReading Time:18MinutesCOULOMB’S LAW: Two point electric charges q1 and q2 at rest, separated by a distance r exert a force on each other whose magnitude is given by If between the two charges there is free space then Where ε0 is the absolute electric permittivity of the free space and ε0 =…
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If we comb our hair on a dry day and bring the comb near small pieces of paper, the comb attracts the pieces, why?
Last modified on:5 years agoReading Time:2Minutes If we comb our hair on a dry day and bring the comb near small pieces of paper, the comb attracts the pieces, why? Answer: This is an example of frictional electricity and induction. When we comb our hair, it gets positively charged by rubbing. When the comb is brought…
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Can two similarly charged bodies attract each other?
Last modified on:5 years agoReading Time:1Minute Yes, when the charge on one body Q is much greater than that on the other q and they are close enough to each other so that force of attraction between Q and induced charge on the other exceeds the force of repulsion between Q and q. However, two similar…
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Differentiation in calculus: Explained with examples
Last modified on:4 years agoReading Time:13MinutesIn mathematics, we use to study the term “Derivative”. It is a very important topic in both pre-calculus and calculus. The term “derivative” plays a very important role in our daily life. With the help of a derivative, we can check the velocity of a moving object. Differentiation is the process…
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MCQ Questions for Class 9 Science Chapter 10 Gravitation
Last modified on:4 years agoReading Time:7MinutesMCQ Questions for Class 9 Science Chapter 10 Gravitation Here we are providing MCQ Questions for Class 9 Science Chapter 10 Gravitation. These questions are prepared by subject expert and is very useful for exams. Students can practice these questions for better understanding, and this will help them in scoring well…
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MCQ Questions for Class 9 Science Chapter 9 Force and Laws of Motion
Last modified on:4 years agoReading Time:7MinutesMCQ Questions for Class 9 Science Chapter 9 Force and Laws of Motion Here we are providing MCQ Questions for Class 9 Science Chapter 9 Force and Laws of Motion. These questions are prepared by subject expert and is very useful for exams. Students can practice these questions for better understanding,…
