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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Capacitance Revision Notes for JEE Main Physics
Last modified on:4 years agoReading Time:2MinutesCapacitance Revision Notes for JEE Main Physics Here we are providing revision notes for JEE Main Physics Chapter Capacitance. This revision notes on capacitor covers all important facts and formulae. Students can use these revision notes for their last minute preparation. This helps in covering the whole chapter in just 15…
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[PDF] Download Revision Notes for Class 9 Science Chapter 8 Motion
Last modified on:4 years agoReading Time:3MinutesDownload Revision Notes for Class 9 Science Chapter 8 Motion A short revision notes of a chapters helps to cover all the important concepts and formula given in the chapter just before the exam. A revision note is basically an overview of complete chapter. This saves our precious time during exam…
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Organic Chemistry Important Reagents and Name Reactions
Last modified on:3 years agoReading Time:3MinutesOrganic Chemistry Important Reagents and Name Reactions What is Reagent? A compound or mixture which is added to a system in order to initiate or test a chemical reaction. Reagents are used to determine the presence and absence of specific chemical substances. List of Specific Name Reactions: The list of all…
