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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Bricks, Beads and Bones Case Study Questions for CBSE Class 12 History Chapter 1
Last modified on:2 years agoReading Time:12Minutes Bricks, Beads and Bones Case Study Questions for CBSE Class 12 History Chapter 1 Taking a close look at the CBSE Sample Papers and Marking Scheme, we have pointed out the important topics for CBSE case study questions in Class 12 History. This is crucial info for students because it…
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Case Study Questions for Class 12 Economics
Last modified on:2 years agoReading Time:11Minutes Case Study Questions for Class 12 Economics Here you will find Case Study Questions for CBSE Class 12 Economics. Units and Chapter List: PART A: INTRODUCTORY MACROECONOMICS PART B: INDIAN ECONOMIC DEVELOPMENT How to be a Well-prepared Examinee? Getting prepared for the CBSE Examinations can be a challenging task, but…
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Financial Market Case Studies for Class 12 Business Studies Chapter 10
Last modified on:2 years agoReading Time:7Minutes Financial Market Case Studies for Class 12 Business Studies Chapter 10 Here you will find Case Study Questions for CBSE Class 12 Business Studies (BST) Chapter 10 Financial Market. Financial Market Case Study Questions Case Study Question 1: Units and Chapter List: Unit 1 – Nature and Significance of Management,…
