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A rectangular coil of 300 turns has an area 25cm x 10cm. The coil rotates with a speed 50 cps in a uniform magnetic field of 4 x 10^-2T about an axis perpendicular to the field. The value of peak induced emf in it is :

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0.3 $π$ volt

3 $π$ volt

30 $π$ volt

3000 $π$ volt

answer is C.

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Detailed Solution

$\begin{aligned} V = NAB ω \\ \Rightarrow 300 \times 250 \times 10^{- 4} \times 4 \times 10^{- 2} \times 100 π \\ = 30 π volt \end{aligned}$

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