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:5 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:5 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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NCERT Solutions for Class 9 Science Chapter 12 Sound
Last modified on:5 years agoReading Time:32MinutesHere we have given NCERT Solutions for Class 9 Science Chapter 12 Sound. Board CBSE Textbook NCERT Class Class 9 Subject Science Chapter Chapter 12 Chapter Name Sound Number of Questions Solved 39 Category NCERT Solutions NCERT Solutions for Class 9 Science Chapter 12 Sound INTEXT Questions Question 1.How does the…
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NCERT Solutions for Class 9 Science Chapter 11 Work and Energy
Last modified on:5 years agoReading Time:28MinutesHere we have given NCERT Solutions for Class 9 Science Chapter 11 Work and Energy. Board CBSE Textbook NCERT Class Class 9 Subject Science Chapter Chapter 11 Chapter Name Work and Energy Number of Questions Solved 34 Category NCERT Solutions NCERT Solutions for Class 9 Science Chapter 11 Work and Energy…
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NCERT Solutions for Class 9 Science Chapter 10 Gravitation
Last modified on:5 years agoReading Time:28MinutesHere we have given NCERT Solutions for Class 9 Science Chapter 10 Gravitation. Board CBSE Textbook NCERT Class Class 9 Subject Science Chapter Chapter 10 Chapter Name Gravitation Number of Questions Solved 33 Category NCERT Solutions NCERT Solutions for Class 9 Science Chapter 10 Gravitation INTEXT Questions Question 1.State the universal…
