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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Test Series for CBSE Term 2 Examination for Class 9 to 12
Last modified on:4 years agoReading Time:20Minutes Test Series for CBSE Term 2 Examination for Class 9 to 12 Are you worried about your CBSE Term 2 Exams? If yes, then you have come to the right place. Here, we are providing test series based on CBSE term 2 Examination for Class 9 to Class 12 studying students. The questions…
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Numericals Based on Class 9 Science Thrust and Pressure
Last modified on:5 months agoReading Time:14Minutes Board CBSE Useful for Class 9 Students Subject Science Chapter Gravitation Topic Thrust and Pressure Type of Questions Numerical Problems Answers Provided Yes Format Question-Answer Format Important Link Class 9 Science Numerical Problems Numericals Based on Class 9 Science Thrust and Pressure Here we are providing numericals based on class…
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Numericals On Class 9 Science Chapter 10 Gravitation
Last modified on:4 years agoReading Time:16MinutesAre you having fear of numerical problems in physics? Do you want to remove this fear? If your answer to the above questions are yes, then you have come to the right place. We can remove any kind of fear by facing it! Believe it or not this is the truth.…
