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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Topicwise Important Questions and Answers for Class 12 Physics Chapter 1 Electric Charges and Fields
Last modified on:4 years agoReading Time:2MinutesHere we are providing topicwise important questions with answers for class 12 physics chapter 1 electric charges and fields. Study notes of topics covered are also provided so that you can revise at the same time before doing the question answer. Topicwise Important Questions and Answers for Class 12 Physics Chapter…
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[PDF] Download NCERT Books for Class 12 Chemistry
Last modified on:6 months agoReading Time:8Minutes The National Council of Educational Research and Training (NCERT) publishes Chemistry textbooks for Class 12. Here we are providing the updated NCERT Books. The use of NCERT Books Class 12 Chemistry is not only suitable for studying the regular syllabus of various boards but it can also be useful for the candidates…
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[PDF] Download NCERT Books for Class 12 Maths
Last modified on:6 months agoReading Time:8Minutes The National Council of Educational Research and Training (NCERT) publishes Maths textbooks for Class 12. Here we are providing the updated NCERT Books. The use of NCERT Books Class 12 Maths is not only suitable for studying the regular syllabus of various boards but it can also be useful for the candidates…
