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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Extra Questions for Class 9 Science Chapter 13 Why Do We Fall Ill
Last modified on:4 years agoReading Time:6MinutesExtra Questions for Class 9 Science Chapter 13 Why Do We Fall Ill Here we are providing extra questions for class 9 science chapter 13 Why Do We Fall Ill. Various type of questions are provided. These includes very short answer type questions, short answer type questions and long answer type…
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Extra Questions for Class 9 Science Chapter 11 Work and Energy
Last modified on:4 years agoReading Time:17MinutesExtra Questions for Class 9 Science Chapter 11 Work and Energy Here we are providing extra questions for class 9 science chapter 11 work and energy. Various type of questions are provided. These includes very short answer type questions, short answer type questions and long answer type questions as well. These…
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Numerical Problems Based on Class 9 Science Chapter 11 Work and Energy
Last modified on:4 years agoReading Time:6MinutesQ.1. A man weighing 70 kg carries a weight of 10 kg on the top of a tower 100 m high. Calculate the work done by the man (g = 10m/s2). Q.2. A porter lifts a luggage of 15 kg from the ground and puts it on his head 1.5 m…
