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:5 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:5 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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NCERT Books For Class 12 Physics
Last modified on:1 year agoReading Time:11Minutes The National Council of Educational Research and Training (NCERT) publishes Physics textbooks for Class 12. Here we are providing the updated NCERT Books. The use of NCERT Books Class 12 Physics is not only suitable for studying the regular syllabus of various boards but it can also be useful for the candidates…
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PowerPoint Presentations for Online Teaching
Last modified on:7 months agoReading Time:4Minutes [Download] PowerPoint Presentations for Online Teaching We are providing PowerPoint Presentations (PPTs) for class 6 to 12. The list of available Presentations (PPTs) is given below. Just click on the link for more details. List of Available PowerPoint Presentations (PPTs) Class and Subjects Why Use Our PPTs for Online Teaching?…
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MCQ Questions for ICSE Class 10 Physics Chapter 10 Magnetic Effect of Current
Last modified on:4 years agoReading Time:8MinutesMCQ Questions for ICSE Class 10 Physics Chapter 10 Magnetic Effect of Current Here we are providing MCQ Questions for ICSE Class 10 Physics Chapter 10 Magnetic Effect of Current. This covers questions from the entire chapter. Practicing these questions will help students to get to the root of each topics. This…
