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.
-
Charging of Insulators
Last modified on:4 years agoReading Time:2Minutes 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…
-
Charging by Contact
Last modified on:4 years agoReading Time:2Minutes Charging by Contact When a negatively charged ebonite rod is rubbed on a metal object, such as a sphere, some of the excess electrons from the rod are transferred to the sphere. Once the electrons are on the metal sphere, where they can move readily, they repel one another and…
-
Charging by Rubbing
Last modified on:4 years agoReading Time:3Minutes Charging by Rubbing The simplest way to charge certain bodies is to rub them against each other. When a glass rod is rubbed with a silk cloth, the glass rod acquires some positive charge and the silk cloth acquires negative charge by the same amount. The explanation of appearance of…
-
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…
-
Case Study Questions for Class 8 Science Chapter 12 Friction
Last modified on:3 years agoReading Time:4MinutesCase Study Questions for Class 8 Science Chapter 12 Friction Here we are providing case study questions for CBSE Class 8 Science Chapter 12 Friction. Case Study Questions Question 1: Friction is a force between two surfaces that are sliding, or trying to slide, across each other. Friction always works in…
-
Case Study Questions for Class 8 Science Chapter 11 Force and Pressure
Last modified on:3 years agoReading Time:5MinutesCase Study Questions for Class 8 Science Chapter 11 Force and Pressure Here we are providing case study questions for CBSE Class 8 Science Chapter 11 Force and Pressure. Case Study Questions Question 1: Read the passage and answer the following questions The discovery of atmospheric pressure gives a fact that…
