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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Class 12 Economics PPT for Online Teaching
Last modified on:3 years agoReading Time:2MinutesHere we are providing class 12th Economics PPTs. Make your online teaching interesting with our interactive PowerPoint presentations for Economics . A must buy for teachers teaching online. Class 12 Economics PPT for Online Teaching Get PowerPoint presentations for complete Class 12 Economics. These PPTs are very useful for teaching purpose. These…
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Download Free Assignments for Class 11 Chemistry Chapter 2 Atomic Structure
Last modified on:4 years agoReading Time:3MinutesWe are providing free Assignments for CBSE Class 11 Chemistry in PDF format. All students studying in class 11 should download the assignments provided here and use them for chapter practice. We are providing both subjective and objective type assignments. Students can also print the assignment after downloading. These assignments are…
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Extra Questions for Class 10 Science Chapter 4 Carbon and Its Compounds
Last modified on:4 years agoReading Time:4MinutesExtra Questions for Class 10 Science Chapter 4 Carbon and Its Compounds Q1. Why does carbon forms large number of compounds? Show Answer Answer: Carbon forms large number of compounds because of tetravalency and catenation property. Tetravalency – Carbon has valency 4, to attain noble gas configuration carbon share its valence…
