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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CBSE Class 10 Science Important Questions Chapter 13 Magnetic Effects of Electric Current
Last modified on:5 years agoReading Time:34MinutesQuestion 1: Which effect of current can be utilised in detecting a current carrying wire concealed in a wall ? Solution : Magnetic effect. Question 2: What conclusion do you get from the observation that a current-carrying wire deflects a compass needle placed near it ? Solution : We conclude that…
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Class 10 Science Magnetic Effects of Electric Current (Solved Assignment-01)
Last modified on:5 years agoReading Time:14MinutesVery Short Answer Type Questions: Question 1: State any two properties of magnetic field lines. Solution : Properties of magnetic field lines: (i) The magnetic field lines originate from the north pole of a magnet and end at its south pole. (ii) The strength of magnetic field is indicated by the…
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Android Smartphone Touch Screen
Last modified on:5 years agoReading Time:3MinutesSmartphone touch screens are capacitive which do not use the pressure of the finger to create a change in the flow of electricity. Instead, they work with anything that holds an electrical charge including human skin. (Yes, we are comprised of atoms with positive and negative charges.) Capacitive touch screens are…
