Saturday 2 February 2013

Fardays Law

Today i am going to give you intro about faraday's law.
Now what is faraday's law:
It states that rate of change of magnetic flux around a closed path produces emf (electromotive force) in other words voltage.
Now question is what is flux:
When magnetic field lines passed through any area, its called flux.
Changing magnetic flux means increasing or decreasing magnetic fields.
This can be achieved by moving a magnet in to and fro motion to the closed loop or path which causes emf in the coil.


                    EMF=-N*d(&)/dt

N: is the number of turns on the Coil
&: is the flux
-  sign: is due to lenz law

Best example is   Transformer

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