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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Extra Questions For Class 10 Maths Chapter 1 Real Numbers Based On Euclid’s Division Algorithm
Last modified on:3 years agoReading Time:9MinutesExtra Questions On Euclid’s Division Algorithm Euclid’s division algorithm is a technique to compute the Highest Common Factor (HCF) of two given positive integers. Recall that the HCF of two positive integers a and b is the largest positive integer d that divides both a and b. To obtain the HCF…
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Extra Questions For Class 10 Maths Chapter 1 Real Numbers Based On Euclid’s Division Lemma
Last modified on:3 years agoReading Time:12MinutesExtra Questions On Euclid’s Division Lemma Given positive integers a and b, there exist unique integers q and r satisfying a = bq + r, where 0 ≤ r < b .Here we call ‘a’ as dividend, ‘b’ as divisor, ‘q’ as quotient and ‘r’ as remainder.≫ Dividend = (Divisor x…
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Physics MCQs for Class 12 with Answers Chapter 5 Magnetism and Matter
Last modified on:5 years agoReading Time:11MinutesQ.1. Ferrites may be:(a) ant. ferromagnetic(b) ferromagnetic(c) ferrimagnetic(d) None of the above Answer (b) ferromagnetic Q.2. The magnetic lines of force inside a bar magnet:(a) do not exist(b) depends on area of cross-section of bar magnet(c) are from N-pole to S-pole of the magnet(d) are from S-pole to N-pole of the…
