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March 7th, 2011, 05:31 AM   #1
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How can a changing magnetic field induce an electric current

Hi all,

How can changing magnetic field to induce an electric current ?

Can you give me Faraday’s law, in simple words ?
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March 7th, 2011, 10:14 AM   #2
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Re: How can changing magnetic field to induce an electric cu

Faraday's law of induction states:

The emf induced in a circuit is directly proportional to the time rate of change of magnetic flux through the circuit.
This statement can be written:

where is the magnetic flux threading the circuit which can be expressed as:

This integral is taken over the area bounded by the circuit. The meaning of the negative sign in the equation for is a consequence of Lenz's law.
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