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…
-
Case Study Questions for Class 12 Chemistry Chapter 1 The Solid State
Last modified on:5 years agoReading Time:11MinutesThere is Case Study Questions in class 12 Chemistry in session 2020-21. The first two questions in the board exam question paper will be based on Case Study and Assertion & Reason. The first question will have 5 MCQs out of which students will have to attempt any 4 questions. The…
-
Chemistry MCQs for Class 11 Chapter 5 States of Matter
Last modified on:4 years agoReading Time:26MinutesHere we are providing MCQ Questions for Class 11 Chemistry Chapter 5 States of Matter. These questions are prepared by subject experts. Practicing these questions will help to score better marks in the exam. MCQ Questions for Class 11 Chemistry Chapter 5 States of Matter Q.1. The rate of diffusion of…
-
Chemistry MCQs for Class 11 Chapter-4 Chemical Bonding and Molecular Structure
Last modified on:4 years agoReading Time:27MinutesHere we are providing MCQ Questions for Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure. There questions are prepared by subject experts and are very useful for your exams. Practicing these questions will help you to score better marks in the exam. MCQ Questions for Class 11 Chapter 4…
