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Q.

The armature of a demonstrator generator consists of a flat square coil of side 4cm and 200 turns. The coil rotates in a magnetic field of 0.75 T. The angular speed so that a maximum emf of 1.6V is generated is

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a

203rad/s

b

203rotations/s

c

203rpm

d

None of these

answer is A.

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Detailed Solution

εmax=NA0Bω  ω=εmaxNA0B    =1.6200×16×10−4(0.75)     =203rad/s
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