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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Case Study Questions for CBSE Class 12 History
Last modified on:2 years agoReading Time:8Minutes Case Study Questions for CBSE Class 12 History 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 gives them a heads-up on changes…
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Assertion Reason Questions for CBSE Class 11 Geography
Last modified on:2 years agoReading Time:11Minutes Assertion Reason Questions for CBSE Class 11 Geography Here we are providing assertion reason questions for CBSE Class 11 Geography. Chapterwise link for assertion reason questions are provided below. Taking a close look at the CBSE Sample Papers and Marking Scheme, we have pointed out the important topics for CBSE…
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Important Questions for CBSE Class 11 Entrepreneurship
Last modified on:2 years agoReading Time:5Minutes Important Questions for CBSE Class 11 Entrepreneurship Here we are providing important questions for cbse class 11 entrepreneurship. All chapters are covered. Different type of questions are provided for better exam preparation. Entrepreneurship CBSE Class 11 The syllabus is divided into seven units: (i) Entrepreneurship: Concept and Functions (ii) An Entrepreneur…
