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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Physics VSQs for Class 11 with Answers Chapter 14 Oscillations
Last modified on:5 years agoReading Time:8Minutes Very Short Answer Type Questions [1 Mark Each] 1. Which of the following conditions is not sufficient for SHM and why? (a) Acceleration α displacement (b) Restoring force α displacement Answer Answer: Condition (a) is not sufficient as the direction of acceleration is opposite to displacement and that needs to…
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Physics VSQs for Class 11 with Answers Chapter 13 Kinetic Theory
Last modified on:5 years agoReading Time:8Minutes Very Short Answer Type Questions [1 Mark Each] Q.1. For ideal behavior of a gas, state the condition in terms of density of the gas. Answer Answer: For ideal gas, P = ρRT For ideal behavior, ρ should be low. Q.2. The velocities of three molecules A,B,C of a gas…
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Physics VSQs for Class 11 with Answers Chapter 12 Thermodynamics
Last modified on:5 years agoReading Time:10Minutes Very Short Answer Type Questions [1 Mark Each] Q.1. Is the heat supplied to a system always equal to the increase in its internal energy? Answer Answer: From 1st law of thermodynamics, dQ = dU + dW If dW = 0, then dQ = dU. i.e. if heat is supplied…
