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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Physics Quick Revision Notes for JEE and NEET
Last modified on:4 years agoReading Time:4MinutesWe are presenting Physics Quick Revision Notes for JEE and NEET. This is a complete revision package for the most important exam of your life. With the passage of time, we tend to forget some concepts and formulae. So, it is very necessary to keep revising all the important concepts and…
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Subscription Plan for Online Tests
Last modified on:4 years agoReading Time:9MinutesAre you looking for a platform where you can check your grasp over a particular topic, chapter or full syllabus? If the answer is yes, then you have come to the perfect place. This is for you! We are offering year long online tests for class 9 to 12, JEE Main…
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Study Materials for Coaching Classes
Last modified on:3 years agoReading Time:10MinutesWe are the leading provider of study materials for coaching classes. This includes Study Notes, DPP, Assignment, Worksheets, PowerPoint Presentations (PPTs), Exercise Worksheets, Class work Assignments for JEE (Main & Advanced), NEET, CBSE, ICSE, Foundation, BITSAT and various other courses. Our High-quality study material which is prepared by the expert faculties…
