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Lenz's law is expressed by the following formula (here $e=$ induced e.m.f., $\varphi=$ magnetic flux in one turn and $N=$ number of turns)
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The correct answer is:
${ }^{e=-N \frac{d \phi}{d t}}$
Correct option is (2) $e=-N \frac{d \phi}{d t}$
An induced electromotive force (emf) always gives rise to a current whose magnetic field opposes the change in original magnetic flux.
$e=-N \frac{d \phi}{d t}$
An induced electromotive force (emf) always gives rise to a current whose magnetic field opposes the change in original magnetic flux.
$e=-N \frac{d \phi}{d t}$
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