Saturday, February 16, 2013

Faraday's law of induction

Faraday's law of induction is a basic law of electromagnetism that predicts how a magnetic field will interact with an electric circuit to produce an electromotive force (EMF)

It is the fundamental operating principle of transformersinductors, and many types of electrical motorsgenerators and solenoids.


Electromagnetic induction is the production of a potential difference (voltage) across a conductor when it is exposed to a varying magnetic field



The induced electromotive force in any closed circuit is equal to the negative of the time rate of change of the magnetic flux through the circuit.




The Farad unit:
The farad (symbol: F) is the SI derived unit of capacitance. The unit is named after the English physicist Michael Faraday.

A farad is the charge in coulombs which a capacitor will accept for the potential across it to change 1 volt
Example: The voltage across a capacitor with capacitance of 47 nF will increase by 1 volt per second with a 47 nA input current.

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Ref: Wikipedia

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