Question

A magnetic flux of $8\times {10}^{-4}$ weber is linked with each turn of a 200 - tunr coil when there is an electric current of 4 A in it. Calculate the self - inductance of the coil.

Answer 1

$\frac{d\varphi }{dt}=8\times {10}^{-4}weber,n=200,i=4AorL=\left(\frac{n}{i}\right)\frac{d\varphi }{dt}=200\times 8\times {10}^{-4}=4\times {10}^{-2}H.$