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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Case Study Questions for CBSE Class 12 Political Science
Last modified on:2 years agoReading Time:9Minutes Board CBSE Useful for Class 12 Students Stream Arts/Humanities Subject Political Science Question Type Case Study Questions With Answers Yes Case Study Questions for CBSE Class 12 Political Science Taking a close look at the CBSE Sample Papers and Marking Scheme, we have pointed out the important topics for CBSE…
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Web Application Development Assertion Reason Questions for Class 12 Informatics Practices
Last modified on:2 years agoReading Time:14Minutes Assertion Reason Questions for Class 12 Informatics Practices Web Application Development Here we are providing assertion reason questions for class 12 informatics practices. Chapterwise assertion reason questions with answers provided below. Students are suggested to solve the questions by themselves first and then check the answers for reference. Web Application…
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IT Applications Assertion Reason Questions for Class 12 Informatics Practices
Last modified on:2 years agoReading Time:14Minutes Assertion Reason Questions for Class 12 Informatics Practices IT Applications Here we are providing assertion reason questions for class 12 informatics practices. Chapterwise assertion reason questions with answers provided below. Students are suggested to solve the questions by themselves first and then check the answers for reference. IT Applications Assertion…
