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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CBSE Class 9 Science Study Notes
Last modified on:5 years agoReading Time:3MinutesCBSE Study Notes for Class 9 Science are provided for the students to help them in their preparation. Study Notes for CBSE Class 9 Science Class 9 Science study notes are given here. Students can click on the links of the particular chapter for which they are finding the notes. Chapter 1 Matter…
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Lakhmir Singh Class 9 Science Solutions
Last modified on:5 years agoReading Time:4MinutesThe text book of Lakhmir Singh And Manjit Kaur for Class 9 Science gives the students a detailed picture about each and every chapter. This is the best book for your class 9 science preparation. We are providing you the detailed solutions for Lakhmir Singh Science for free. Links for all chapters are given below. These solutions…
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CBSE Class 9 Science Chapter Wise MCQ Questions
Last modified on:5 years agoReading Time:2MinutesMCQ Questions for Class 9 Science Class 9 Science NCERT Solutions is given here. Students can click on the links of the particular chapter for which they are finding the solutions. Chapter 1 Matter in Our Surroundings Chapter 2 Is Matter Around Us Pure Chapter 3 Atoms and Molecules Chapter 4…
