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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[PDF] Download Latest Study Modules for CBSE Class 10 Science
Last modified on:3 years agoReading Time:5Minutes This well-prepared study modules can help you to understand the concepts and topics covered in each chapter in a very efficient way. Studying these professionally made study modules can help students to score excellent marks in their exam. All these chapter notes are available in PDF format. So, students can…
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[PDF] Download NEET Chapterwise Practice Tests for Physics
Last modified on:3 years agoReading Time:6MinutesHere we are providing Chapterwise Tests for NEET. These chapterwise tests on Physics is prepared by subject expert. Practicing these tests will boost your confidence. The test will be provided in PDF Format. Now Download NEET Chapterwise Practice Tests for Physics Features of this test series: Instant access via Email! You…
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MCQ Questions for Class 11 Physics Chapter 6 Work Energy and Power
Last modified on:4 years agoReading Time:12MinutesMCQ Questions for Class 11 Physics Chapter 6 Work Energy and Power Q.1. The magnitude of work done by a force(a) depends on frame of reference(b) does not depend on frame of reference(c) cannot be calculated in non-inertial frames.(d) both (a) and (b) Answer Answer: (a) Q.2. No work is done…
