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 12 Thermodynamics
Last modified on:4 years agoReading Time:9MinutesAssertion and Reason Questions for Class 11 Physics Chapter 12 Thermodynamics Directions: Each of these questions contain two statements, Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and…
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Assertion and Reason Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter
Last modified on:4 years agoReading Time:8MinutesHere we have provided assertion and reason questions for class 11 physics chapter 11 Thermal Properties of Matter. These questions are prepared by subject experts. Students can use these questions for practice. Assertion and Reason Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter Directions: Each of these questions…
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Assertion and Reason Questions for Class 11 Physics Chapter 15 Waves
Last modified on:4 years agoReading Time:22Minutes Assertion and Reason Questions for Class 11 Physics Chapter 15 Waves Directions: (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is…
