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 Maths with Answers Chapter 6 Triangles
Last modified on:3 years agoReading Time:10MinutesQ.1. Two isosceles triangles have equal angles and their areas are in the ratio 16: 25. The ratio of corresponding heights is:(A) 4:5(B) 5:4(C) 3:2(D) 5:7 Answer Answer: (A) 4:5 Q.2. In the figure, PB and QA are perpendicular to segment AB. If OA = 5 cm, PO = 7cm and…
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Case Study Questions for Class 10 Maths Chapter 1 Real Numbers
Last modified on:3 years agoReading Time:7MinutesCase Study Questions for Class 10 Maths Chapter 1 Real Numbers Question 1: HCF and LCM are widely used in number system especially in real numbers in finding relationship between different numbers and their general forms. Also, product of two positive integers is equal to the product of their HCF and…
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Assertion and Reason Questions for Class 9 Science Chapter 2 Is Matter Around Us Pure
Last modified on:12 months agoReading Time:13MinutesHere we are providing assertion reason questions for class 9 science. This article covers assertion reason questions based on Class 9 Science Chapter 2 Is Matter Around Us Pure. To check the answer, click on ‘Answer’ given below each question. After clicking it will expand. Assertion and Reason Questions for Class…
