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Q.

A coil of area 80 square cm and 50 turns is rotating with 2000 revolutions per minute about an axis perpendicular to a magnetic field of 0.05 Tesla. The maximum value of the e.m.f. developed in it is

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a

200π volt

b

10π3volt

c

4π3 volt

d

23 volt

answer is C.

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Detailed Solution

e=NBAω;ω=2πf=2π×200060∴e=50×0.05×80×10−4×2π×200060=4π3
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