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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Lenz’s law
Last modified on:5 years agoReading Time:4MinutesWhat is Lenz’s Law? This law gives us the direction of induced emf. According to this law, the direction of induced emf in a circuit is such that it opposes the change in magnetic flux responsible for its production. Lenz’s law is in accordance with the principle of conservation of energy.…
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Magnetic Flux
Last modified on:5 years agoReading Time:3MinutesWhat is Magnetic Flux? Flux is basically count of number of lines crossing a surface. The number of magnetic field lines crossing a surface is known as magnetic flux linked with that surface. Consider a closed curve enclosing an area A (as shown in the figure). Let there be a uniform…
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Electromagnetic Induction
Last modified on:5 years agoReading Time:4MinutesWhat is Electromagnetic Induction? It was discovered by Michael Faraday in 1831. It is the phenomenon of generating an emf by changing the number of magnetic field lines (i.e. magnetic flux) associated with the circuit. We have studied that moving charges or current produces magnetic field. Then normally we get a doubt whether…
