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 The Fundamental Theorem of Arithmetic
Last modified on:3 years agoReading Time:6MinutesEvery composite number can be expressed (factorised) as a product of primes, and this factorisation is unique, apart from the order in which the prime factors occur. The prime factorisation of a natural number is unique, except for the order of its factors. ⊕ Property of HCF and LCM of two…
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Extra Questions For Class 10 Maths Chapter 1 Real Numbers Based On Rational Numbers and Their Decimal Expansions
Last modified on:3 years agoReading Time:1MinuteExtra Questions On Euclid’s Division Lemma Question:Without actually performing the long division, state whether the following rational numbers willhave a terminating decimal expansion or a non-terminating repeating decimal expansion: (i) 13 / 3125 (ii) 129 / 225775 (iii) 77 / 210 (iv) 14587 / 1250 (v) 833 / 225572 Related Posts
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Extra Questions For Class 10 Maths Chapter 1 Real Numbers Based On Irrationality of Numbers
Last modified on:3 years agoReading Time:3MinutesExtra Questions On Irrationality of Numbers Question: Prove that √5 is an irrational number. Solution: Let √5 is a rational number then we have √5=p/q, where p and q are co-primes. ⇒ p =√5q Squaring both sides, we get p2=5q2 ⇒ p2 is divisible by 5 ⇒ p is also divisible by…
