Lenz's law is expressed by the following form | vedclass

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(B) According to Faraday's law of electromagnetic induction,the induced $e.m.f.$ $(e)$ in a coil is equal to the negative rate of change of magnetic f

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$e = - N \frac{d\phi}{dt}$

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(B) According to Faraday's law of electromagnetic induction,the induced $e.m.f.$ $(e)$ in a coil is equal to the negative rate of change of magnetic flux linked with the coil.If there are $N$ turns in the coil,the total magnetic flux linkage is $N\phi$.Therefore,the induced $e.m.f.$ is given by the formula:$e = - \frac{d}{dt} (N\phi) = - N \frac{d\phi}{dt}$The negative sign indicates Lenz's law,which states that the induced $e.m.f.$ opposes the change in magnetic flux that produced it.

Lenz's law is expressed by the following formula (here $e$ = induced $e.m.f.$,$\phi$ = magnetic flux in one turn and $N$ = number of turns).

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