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.
-
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…
-
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…
-
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…
-
Class 10 Chemistry Periodic Classification of Elements
Last modified on:5 years agoReading Time:16MinutesImportant Notes Early chemists classified elements as metals and non-metals on the basis of a set of physical and chemical properties. Dobereiner classified elements on the basis of “Law of Triads” which states that “atomic mass of the middle element of a triad is almost the arithmetic mean of the other…
-
Class 10 Science Acids, Bases & Salt Important Questions
Last modified on:5 years agoReading Time:22MinutesVery Short Answer Questions Blue and red litmus papers are placed simultaneously in a colourless aqueous solution. It is found that the colour of both litmus papers is red. What is the nature of the solution and why? A strip of absolutely clear cloth is sprayed with onion juice. The strip…
-
Class 9 Science Atoms & Molecules
Last modified on:5 years agoReading Time:4MinutesImportant Notes Law of conservation of mass : Mass can neither be created nor can it be destroyed in a chemical reaction. Law of constant proportions : In a pure substance same elements are always present in a definite proportion by weight. Atom : Smallest unit of an element, which may…
