2009-01-16

Faraday's Law of Electromagnetic Induction

Faraday's law of Electromagnetic Induction states that:

"The Magnitude of the induced e.m.f is directly proportional to the rate of change of magnetic flux experienced by the conductor".

When a bar magnetic moves in a solenoid (coiled wires),there is a change in the magnetic flux linkage through the coil. An induced e.m.f is produced in the coil. The magnitude of the e.m.f increases when:

-the relative motion between the magnet and the coil is increased.
-the number of turns on the coil is increased.
-the cross sectional area of the coil is increased.

The direction of the induced current can be determined by using the Lenz's Law.

1 comment:

Anonymous said...

Lenz's law states dat an induced e.m.f always gives rise to a current whose magnetic field opposes the original change in the magnetic flux