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Q.

The number of turns in the coil of an ac¬ generator is 5000 and the area of the coil is  0.25 m2. The coil is rotated at the rate of 100 cycles/sec in a magnetic field of 0.2 W/m2. The peak value of the emf generated is nearly

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a

786 kV

b

440 kV

c

220 kV

d

1570 kV

answer is D.

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Detailed Solution

e0=ωNBA=(2πv)NBA=2×3.14×1000×5000×0.2×0.25=1570kV
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