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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Case Study Questions for Class 11 Maths Chapter 14 Mathematical Reasoning
Last modified on:3 years agoReading Time:8Minutes [PDF] Download Case Study Questions for Class 11 Maths Chapter 14 Mathematical Reasoning Here we are providing case study questions for class 11 maths. In this article, we are sharing Class 11 Maths Chapter 14 Mathematical Reasoning. All case study questions of class 11 maths are solved so that students…
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Numericals on Force and Laws of Motion for Class 9
Last modified on:1 year agoReading Time:21Minutes Numericals on Force and Laws of Motion for Class 9 Here you will find numericals on force and laws of motion for class 9. Problem 1: Find the force acting on a rocket and its acceleration if its velocity is 600 m s–1 at t = 60 s and 1000…
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Case Study Questions for Class 11 Maths Chapter 12 Introduction to Three Dimensional Geometry
Last modified on:3 years agoReading Time:8Minutes [PDF] Download Case Study Questions for Class 11 Maths Chapter 8 Binomial Theorem Here we are providing case study questions for class 11 maths. In this article, we are sharing Class 11 Maths Chapter 12 Introduction to Three Dimensional Geometry. All case study questions of class 11 maths are solved…
