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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NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations
Last modified on:5 years agoReading Time:21MinutesNCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations Gurukul Provides NCERT Solutions for Class 10 Science. You can download these solutions in PDF format for free. All questions are solved by subject experts keeping in mind the NCERT guidelines. Students can use these questions for practice. Here, we…
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Class 10 Important Notes Chapter 1 Chemical Reactions & Equations
Last modified on:5 years agoReading Time:16Minutes1. The changes which take place in substances can be broadly classified as physical changes and chemical changes. 2. During a physical change, only the state of the substance changes, but not its chemical composition. Furthermore, a physical change is a temporary change, which can be reversed by changing the physical…
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IMPORTANT NOTES (Electricity)
Last modified on:5 years agoReading Time:10Minutes1. There are two kinds of electric charges i.e., positive and negative. The opposite charges attract each other and the similar charges repel each other. Coulomb (C) is the standard unit of charge. 2. Conductors: The substances through which electricity can flow are called conductors. Silver, copper, gold and aluminium are…
