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MHT CET 2025 (23 Apr, Shift 2) · Magnetic Flux & Faraday's Law

Magnetic Flux & Faraday's Law question from MHT CET 2025 (23 Apr, Shift 2)

Q27MHT CET 2025 · 23 APR · SHIFT 2Easy

Magnetic Flux & Faraday's Law

A coil of n turns and resistance $R\Omega$ is connected in series with resistance $R/4$ . The combination is moved for time $t$ second through magnetic flux $\phi_1$ to $\phi_2$ . The induced current in the circuit is

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Answer: (b)

Total resistance $R + \frac{R}{4} = \frac{5R}{4}$
Emf $e = \frac{n(\phi_1 - \phi_2)}{t}$
$I = \frac{e}{5R/4} = \frac{4n(\phi_1 - \phi_2)}{5Rt}$
So the answer is (b) $\frac{4n(\phi_1 - \phi_2)}{5Rt}$ .

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