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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Frictional Electricity
Last modified on:3 years agoReading Time:10Minutes What is frictional electricity? Frictional electricity, also known as static electricity, is the type of electricity that results from the friction or rubbing of two objects together. When two objects are rubbed against each other, the friction between them can cause the transfer of electrons from one object to the…
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Alternating Current
Last modified on:3 years agoReading Time:24Minutes What is Alternating Current (A.C.)? Alternating Current (AC) is an electrical current that periodically reverses direction in a circuit. Unlike Direct Current (DC), which flows only in one direction, AC constantly changes its polarity and magnitude over time. Explanation: In an AC circuit, electrons periodically switch direction, moving back and…
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Terminal Velocity
Last modified on:3 years agoReading Time:13Minutes What is Terminal Velocity? Terminal velocity is the constant maximum speed reached by an object in free fall or falling through a fluid (such as air or water) when the force of air resistance or fluid resistance becomes equal in magnitude and opposite in direction to the force of gravity…
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MCQ based on Electric Potential for NEET
Last modified on:5 years agoReading Time:8MinutesQ.1. In a region of constant potential(a) the electric field is uniform(b) the electric field is zero(c) the electric field shall necessarily change if a charge is placed outside the region(d) None of these Answer Answer: (b) Q.2. A cube of a metal is given a positive charge Q. For this…
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MCQ based on Gauss Law for NEET
Last modified on:5 years agoReading Time:6MinutesQ.1. What about Gauss’s theorem is not incorrect?(a) It can be derived by using Coulomb’s Law(b) It is valid for conservative field obeys inverse square root law(c) Gauss’s theorem is not applicable in gravitation(d) Both (a) & (b) Answer Answer: (d) Q.2. A uniformly charged conducting sphere of 4.4 m diameter…
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MCQ based on Electric Flux for NEET
Last modified on:5 years agoReading Time:7MinutesQ.1. The number of electric lines of force that radiate outwards from one coulomb of charge in vacuum is(a) 1.13 × 1011 (b) 1.13 × 1010 (c) 0.61 × 1011 (d) 0.61 × 109 Answer Answer: (a) Φ = q/ε0 = 1.13 × 1011 Q.2. If the electric flux entering and…
