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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Best Books for CBSE Class 10 Maths – PDF Download
Last modified on:10 months agoReading Time:6Minutes Mathematics is a crucial subject in CBSE Class 10 that requires clear concepts, regular practice, and the right study material. Whether you’re aiming for full marks or want to build strong foundational skills for Class 11, choosing the right book is key. In this post, we present the most useful…
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Best Books for CBSE Class 10 Science – PDF Download
Last modified on:10 months agoReading Time:7MinutesAre you preparing for the CBSE Class 10 Science exam and wondering which books are the most reliable and effective for study and revision? You’ve come to the right place. In this post, we’ve compiled the best CBSE Class 10 Science books that are aligned with the latest syllabus and exam…
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The Ever-Evolving World of Science Notes for Class 7 Science Curiosity Chapter 1
Last modified on:5 months agoReading Time:14Minutes 1. Introduction to Science: A Way of Thinking Science is not just a collection of facts and formulas. It is a way of understanding the world around us. It begins with curiosity—the desire to know how and why things happen. From observing the fluttering of a butterfly to watching how…
