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 10 Science Chapter 5 Periodic Classification of Elements
Last modified on:3 years agoReading Time:12MinutesMCQ Questions for Class 10 Science Chapter 5 Periodic Classification of Elements Q.1. An element has an atomic number of 15 with which of the following elements will it show similar chemical properties?(a) Be(4) (b) Ne(10)(c) N(7) (d) O(8) Answer Answer: (c) Q.2. The group number and period number respectively of…
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Case Study and Passage Based Questions for Class 10 Science Chapter 8 How Do Organisms Reproduce
Last modified on:3 years agoReading Time:5MinutesCase Study Questions for Class 10 Science Chapter 8 How Do Organisms Reproduce In CBSE Class 10 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage based as well. In that, a paragraph will be…
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Class 11 and 12 Maths PPT for Online Teaching
Last modified on:3 years agoReading Time:3MinutesClass 11 and 12 Maths PPT for Online Teaching We are providing class 11th and 12th Maths PPTs. Make your online teaching interesting with our interactive PowerPoint presentations for Maths. A must buy for teachers teaching online. Get PowerPoint presentations for complete Maths. These PPTs are very useful for teaching purpose. These…
