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JEE Main 2004 (AIEEE) · Magnetic Flux & Faraday's Law

Magnetic Flux & Faraday's Law question from JEE Main 2004 (AIEEE)

Q85JEE Main 2004 · AIEEEEasy

Magnetic Flux & Faraday's Law

A coil having $n$ turns and resistance $R\Omega$ is connected with a galvanometer of resistance $4R\Omega.$ This combination is moved in time $t$ seconds from a magnetic field $W_1$ weber to $W_2$ weber. The induced current in the circuit is

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Answer: (b)

Total resistance $R + 4R = 5R$
Faraday-Lenz: $e = -\frac{n(W_2 - W_1)}{t}$
$I = \frac{e}{5R} = -\frac{n(W_2 - W_1)}{5Rt}$
So the answer is (b) $-\frac{n(W_2 - W_1)}{5Rt}$ .

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