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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Conceptual Questions Based on Electromagnetic Induction
Last modified on:4 years agoReading Time:7MinutesQ.1. Will an induced emf develop in a conductor, when moved in a direction parallel to the magnetic field ? Solution. No, because the magnetic flux linked with the conductor does not change when it is moved parallel to the magnetic field. Moreover, the magnetic Lorentz force on the free electrons…
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Study Modules for NEET
Last modified on:3 years agoReading Time:3MinutesHere we are providing best study modules for NEET. This well-prepared study modules for NEET can help you to understand each chapter properly. Studying these professionally made study modules can help students to score excellent marks in their exam. All these chapter study modules are available in PDF and PageMaker Format.…
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Chapterwise MCQ Question Bank for JEE Main Chemistry with Answers
Last modified on:3 years agoReading Time:4MinutesChapterwise MCQ Question Bank for JEE Main Chemistry with Answers Here we are providing MCQ Questions for JEE Main Chemistry with Answers and Detailed Explanations. Get this question bank product for your institutes in editable format. This Question Bank containing more than 10,000 questions for JEE Main Chemistry is completely editable.…
