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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Quick Revision Notes for Class 12 Physics Term 1 Exam
Last modified on:4 years agoReading Time:1MinuteHere we are providing quick revision notes for class 12 physics term 1 examination. This revision notes are prepared strictly according to the latest reduced syllabus. This quick revision notes covers all the chapters included in class 12 physics term 1 syllabus. Students can use this revision notes for quick review…
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Class 11 and 12 Biology PPT for Online Teaching
Last modified on:3 years agoReading Time:2MinutesClass 11 and 12 Biology PPT for Online Teaching We are providing class 11th and 12th Biology PPTs. Make your online teaching interesting with our interactive PowerPoint presentations for Biology. A must buy for teachers teaching online. Get PowerPoint presentations for complete biology. These PPTs are very useful for teaching purpose. These…
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Class 11 and 12 Physics PPT for Online Teaching
Last modified on:3 years agoReading Time:3MinutesClass 11 and 12 Physics PPT for Online Teaching We are providing class 11th and 12th Physics PPTs. Make your online teaching interesting with our interactive PowerPoint presentations for Physics. A must buy for teachers teaching online. Get PowerPoint presentations for complete physics. These PPTs are very useful for teaching purpose.…
