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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Sets Formulas For Class 11
Last modified on:4 years agoReading Time:8MinutesSets Formulas For Class 11 Here we are providing Sets Formula For Class 11 Maths. Practice sets problems based on these formulas. Important terms and definitions are also included so that you can revise them in a very short time. A set is the mathematical model for a collection of different…
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MCQ Questions for Class 12 Biology Chapter 14 Ecosystem
Last modified on:4 years agoReading Time:10MinutesMCQ Questions for Class 12 Biology Chapter 14 Ecosystem Here we are providing mcq questions for class 12 biology chapter 14 ecosystem. These questions are prepared by subject expert and are based on latest syllabus prescribed by board. Students can practice these questions to score better marks in their exams. Q.1.…
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MCQ Questions for Class 12 Biology Chapter 13 Organisms and Populations
Last modified on:4 years agoReading Time:12MinutesMCQ Questions for Class 12 Biology Chapter 13 Organisms and Populations Here we are providing MCQ questions for Class 12 Biology Chapter 13 Organisms and Populations. These questions are prepared by subject expert and is according to the latest pattern prescribed by CBSE board. Students can practice these questions to score…
