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.
-
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 =…
-
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…
-
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…
-
Assertion Reason Questions for Class 11 Maths Chapter 10 Straight Lines
Last modified on:3 years agoReading Time:12Minutes[PDF] Download Assertion Reason Questions for Class 11 Maths Chapter 10 Straight Lines Here we are providing assertion reason questions for class 11 maths. In this article, we are covering Class 11 Maths Chapter 10 Straight Lines Assertion Reason Questions. Detailed Solutions are also provided at the end of questions so…
-
Problems Based on Types of Relation for Class 12 Maths
Last modified on:3 years agoReading Time:8MinutesTypes of Relations Problems Based on Types of Relation for Class 12 Maths Here we are providing problems based on types of relations for class 12 maths. Q 1. Let A = {3, 5} and {7,11}. Let R = {(a, b) : a ∈ A, b ∈ B, a –…
-
Numerical Problems Based on Electric Charge for Class 12 Physics
Last modified on:3 years agoReading Time:10MinutesElectric Charge An electric charge is a fundamental property of matter that describes the amount of electrical energy associated with an object. It is a fundamental property of particles such as protons, electrons, and ions, which are the building blocks of matter. Electric charge is either positive or negative. Protons carry…
