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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Chapterwise MCQ Question Bank for JEE Main Mathematics with Answers
Last modified on:3 years agoReading Time:3MinutesSpeed and accuracy are essential for success in highly competitive exams such as JEE Main. This can only be achieved via consistent practice and regular revision. For this, we at Physics Gurukul has compiled a series of multiple-choice questions (MCQs) on all JEE concepts. Here we are providing MCQ Question Bank…
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Conceptual Questions Based on Class 11 Physics Projectile Motion
Last modified on:3 years agoReading Time:14MinutesHere we are providing conceptual questions for Class 11 Physics Projectile Motion. Answers are also provided along with questions. So that students can read and understand the question. These questions are prepared by the subject experts. Students can read these conceptual questions based on Projectile Motion for better topic clarity and…
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Conceptual Questions Based on Class 11 Physics Motion in A Straight Line
Last modified on:3 years agoReading Time:23MinutesHere we are providing conceptual questions for Class 11 Physics Motion in A Straight Line. Answers are also provided along with questions. So that students can read and understand the question. These questions are prepared by the subject experts. Students can read these conceptual questions based on Motion in A Straight…
