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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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…
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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…
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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…
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Important Derivations for Class 12 Physics Chapter 7 Alternating Current
Last modified on:3 years agoReading Time:12MinutesImportant Derivations for Class 12 Physics Chapter 7 Alternating Current Derivations Related to A.C. Applied Across an Inductor Derivation 1: (1) An ac voltage, V = V0 sin wt, is applied across a pure inductor L. Obtain an expression for the current I in the circuit and hence obtain the(i) inductive…
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Important Derivations for Class 12 Physics Chapter 1 Electric Charges and Fields
Last modified on:3 years agoReading Time:15MinutesImportant Derivations for Class 12 Physics Chapter 1 Electric Charges and Fields Q.1. Using Gauss’s law, prove that the electric field at a point due to a uniformly charged infinite plane sheet is independent of the distance from it. Solution: Q.2. Derive an expression for the torque experienced by an electric…
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Problems Based on Equation of SHM for JEE Physics
Last modified on:3 years agoReading Time:8MinutesEquation of SHM Velocity in SHM Acceleration in SHM Q.1. Prove that y = Aeiωt is an equation of SHM. Solution:
