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Using Lenz's Law

The magnetic ...

Question

The magnetic flux linked with a coil is changed from $10$ Weber to $1$ weber in $0.1$ sec. Find the electromotive force induced in the coil.

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Solution

Change n in magnetic flux $Δ ϕ = 1 - 10 = - 9$ Weber
Time taken $Δ t = 0.1$ sec
So, emf induced in the coil $E = - \frac{Δ ϕ}{Δ t}$
$⟹ E = - \frac{(- 9)}{0.1} = 90$ Volts

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