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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Class 10 Biology How do organisms reproduce (Important Questions with Answers)
Last modified on:5 years agoReading Time:52MinutesClass 10 Biology How Do Organisms Reproduce Important Questions Very Short Answer Questions [1 Marks] 1. Define reproduction. Ans. The process of producing new individuals of the same species by existing organisms, i.e., parents, is known as reproduction. 2. Name two organisms that show asexual reproduction. Ans. Amoeba and yeast…
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Class 10 Biology How do organisms reproduce (NCERT Solution)
Last modified on:5 years agoReading Time:15MinutesCBSE Class X Biology How Do Organisms Reproduce (NCERT Solution) Q. 1. What is the importance of DNA copying in reproduction? Ans. The creation of a DNA copy is essential to produce organisms which are similar to their parents. As copying of DNA brings some variations each time, the surviving cells…
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CBSE Class 10 Science Chapter 10 Light MCQ Assignment
Last modified on:3 years agoReading Time:12MinutesMULTIPLE CHOICE QUESTIONS 1. Focal length of plane mirror is (a) at infinity (b) zero (c) negative (d) none of these 2. Image formed by plane mirror is (a) real and erect (b) real an inverted (c)…
