Class - XII Physics
Faraday has performed many experiments on electromagnetic
induction. He summed up his conclusions as :
1.
When the magnetic flux linking a conductor or a
coil changes, an e.m.f is induced in it.
2.
This induced emf lasts so long as the change in
magnetic flux continues.
3.
The magnitude of induced emf in a conductor or a
coil is directly proportional to the rate of change of flux linkages.
i.e. Induced emf α Rate
of change of flux linkages
where K is a proportionality constant and it’s value in SI System is 1.
In differential form,
Since, the direction of induced emf is always opposite direction to the
cause due to which it is produced.
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