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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MCQ Questions for Class 12 Chemistry Chapter 15 Polymers
Last modified on:4 years agoReading Time:6MinutesMCQ Questions for Class 12 Chemistry Chapter 15 Polymers Q.1. Orlon is a polymer of:(a) Styrene (b) Tetrafluoroethylene (c) Vinyl chloride (d) Acrylonitrile Answer Answer: (d) Q.2. Chemically rayon is(a) Cellulose nitrate (b) Cellulose sulphate (c) Cellulose acetate (d) Cellulose phosphate Answer Answer: (c) Q.3. Which of the following is not…
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Numerical Value and Integer Answer Type Questions For JEE Main
Last modified on:4 years agoReading Time:3Minutes650+ Numerical Value and Integer Type Questions Based on Complete Physics Syllabus For JEE Main Numerical Value (Integer) type questions are the new addition to JEE Main paper pattern. There will be a total of 30 numerical value type questions in JEE Main. You have to attempt only 15 questions out of…
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Assertion Reason Questions for Class 10 Maths Chapter 1 Real Numbers
Last modified on:2 years agoReading Time:10Minutes Board CBSE Useful for Class 10 Students Subject Maths Chapter Chapter 1 Real Numbers Type of Questions Assertion and Reason Format Question-Answer Format Important Link Class 10 Maths Chapterwise Assertion Reason Assertion Reason Questions for Class 10 Maths Chapter 1 Real Numbers Here we are providing Assertion Reason Questions for…
