The mutual inductance between a pair of coils each of $N$ turns is $M$ . If a current is $I$ in the first coil is bought to zero in a time $t$ , then the average emf induced in the second coil is:

\frac{M I}{t}

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\frac{M t}{I}

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\frac{M t}{I M}

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\frac{I t}{M N}

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Solution

The correct option is A $\frac{M I}{t}$
$ϕ = M i$
$E m f = \frac{ϕ}{t} = \frac{M i}{t}$
So, emf induced $= \frac{M I}{T}$

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The mutual inductance between a pair of coils each of N turns is M. If a current is I in the first coil is bought to zero in a time t, then the average emf induced in the second coil is:

The correct option is A MItϕ=MiEmf=ϕt=MitSo, emf induced =MIT

The mutual inductance between a pair of coils each of $N$ turns is $M$ . If a current is $I$ in the first coil is bought to zero in a time $t$ , then the average emf induced in the second coil is:

The correct option is A $\frac{M I}{t}$
$ϕ = M i$
$E m f = \frac{ϕ}{t} = \frac{M i}{t}$
So, emf induced $= \frac{M I}{T}$