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:4 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:4 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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Objective Question Bank for Class 12 Physics
Last modified on:2 years agoReading Time:4MinutesAre you looking for Objective Question Bank for Class 12 Physics? If yes, then you have come to the best place. Here we are providing Objective Question Bank for Class 12 Physics. This Objective Question Bank contains different type of objective questions like MCQs, Case Study, Passage Based & Assertion Reason Type Questions.…
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Revision Notes for Class 12 Business Studies Chapter 10 Financial Market
Last modified on:3 years agoReading Time:24MinutesRevision Notes for Class 12 Business Studies Chapter 10 Financial Market Here we are providing Revision Notes for Class 12 Business Studies Chapter 10 Financial Market. These are the important points related to the chapter. Students should remember these points. INTRODUCTION The existence of well developed financial markets is indispensable for…
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Revision Notes for Class 12 Business Studies Chapter 9 Financial Management
Last modified on:3 years agoReading Time:37MinutesRevision Notes for Class 12 Business Studies Chapter 9 Financial Management Here we are providing Revision Notes for Class 12 Business Studies Chapter 9 Financial Management. These are the important points related to the chapter. Students should remember these points. CONCEPT OF FINANCIAL MANAGEMENT Financial Management is concerned with optimal procurement…
