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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Maxima and Minima Formulas for Class 12 Maths
Last modified on:4 years agoReading Time:1Minute Maxima and Minima Formulae list provided here forms a strong base during your preparation. Learn all the Maths Concepts well and apply formulae to solve your problems. You can answer any question and solve any problem based on Maxima and Minima easily by referring the below formulas. Maxima and Minima…
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Tangent and Normal Formulas for Class 12 Maths
Last modified on:4 years agoReading Time:1Minute Tangent and Normal Formulae list provided here forms a strong base during your preparation. Learn all the Maths Concepts well and apply formulae to solve your problems. You can answer any question and solve any problem based on Tangent and Normal easily by referring the below formulas. Tangent and Normal…
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IIT Foundation Materials for Classes 8 to 10
Last modified on:4 years agoReading Time:4MinutesIIT Foundation Materials for Classes 8 to 10 (High Level Materials) IIT foundation course for class 8, 9 and 10 is very important for future IIT JEE aspirants. Students preparing for IIT JEE from class 8th onwards are always ahead of their competition. This foundation course teaches the students basic concepts…
