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:5 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:5 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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NUMERICALS BASED ON CONVEX AND CONCAVE MIRROR
Last modified on:6 months agoReading Time:38Minutes Download free printable assignments and worksheets of class 10 Science. Free PDF Download- Best collection of notes, important questions, sample papers and NCERT Solution for CBSE Class 10 Science. Below you will find the homework assignment for CBSE Class 10 Light- Reflection and Refraction. NUMERICALS BASED ON CONVEX AND CONCAVE…
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MCQ Questions for Class 10 Science Chapter 12 Electricity
Last modified on:4 years agoReading Time:11MinutesMCQ Questions for Class 10 Science Chapter 12 Electricity 1. What is the amount of current flowing through an electric press, if the amount of charge passing through a conductor in 10 minutes is 300 C?(a) 30 A (b) 0.3 A (c) 0.5 A (d) 5 A Answer (c) 0.5 A 2. When…
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Class 10 Science Chapter 12 Electricity Study Notes
Last modified on:5 years agoReading Time:1MinuteDownload free printable assignments and worksheets of class 10 Science. Free PDF Download- Best collection of notes, important questions , sample papers and NCERT Solution for CBSE Class 10 Science. Below you will find the home work assignment for CBSE Class 10 Electricity. For more exclusive study material for science please…
