The back e.m.f induced in coil when electric charges from 1A to zero in millisecond is 4 volt. Find the self induction n(L) of coil.
Gives
L=?
We know that
e=Ldidte=L\frac{di}{dt}e=Ldtdi
Put value
L=edidtL=\frac{e}{\frac{di}{dt}}L=dtdie
L=4mHL=4mHL=4mH
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