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Q.

The coil of an ac generator rotates at a frequency of 60 Hz and develops an inducecd emf of 120 V (rms). The coil has an area of 3.0 x10-3 m2 and consists of 500 turns. The magnitude of the magnetic field in which the coil rotates is

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a

30 T

b

3.00 T

c

0.30 T

d

0.03 T

answer is A.

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Detailed Solution

B=2Vr.m.sNAω on putting the values we get  B=0.30T

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