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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Assertion and Reason Questions for Class 11 Physics Chapter 13 Kinetic Theory
Last modified on:3 years agoReading Time:6MinutesAssertion and Reason Questions for Class 11 Physics Chapter 13 Kinetic Theory Directions: Choose the correct option from the following:(a) Both A and R are true and R is the correct explanation of A(b) Both A and R are true but R is NOT the correct explanation of A(c) A is…
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Assertion and Reason Questions for Class 11 Chemistry Chapter 5 States of Matter
Last modified on:5 months agoReading Time:5MinutesAssertion and Reason Questions for Class 11 Chemistry Chapter 5 States of Matter Directions: (a) Assertion and reason both are correct statements and reason is correct explanation for assertion.(b) Assertion and reason both are correct statements but reason is not correct explanation for assertion.(c) Assertion is correct statement but reason is…
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Assertion and Reason Questions for Class 11 Chemistry Chapter 10 The s-Block Elements
Last modified on:5 months agoReading Time:8MinutesAssertion and Reason Questions for Class 11 Chemistry Chapter 10 The s-Block Elements Directions:(a) Assertion and reason both are correct statements and reason is correct explanation for assertion.(b) Assertion and reason both are correct statements but reason is not correct explanation for assertion.(c) Assertion is correct statement but reason is wrong…
