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MHT CET 2023 (11 May, Shift 2) · Magnetic Flux & Faraday's Law

Magnetic Flux & Faraday's Law question from MHT CET 2023 (11 May, Shift 2)

Q43MHT CET 2023 · 11 MAY · SHIFT 2Easy

Magnetic Flux & Faraday's Law

A coil having effective area ' $A$ ' is held with its plane normal to a magnitude field of induction ' $B$ '. The magnetic induction is quickly reduced to $25\%$ of its initial value in 1 second. The e.m.f. induced in the coil (in volt) will be

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Answer: (d)

$e = \frac{A\,\Delta B}{\Delta t}$
Reduced TO $25\%$ : $\Delta B = 0.75B = \frac{3B}{4}$
$e = \frac{3BA/4}{1} = \frac{3BA}{4}$
So the answer is (d) $\frac{3BA}{4}$ .

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