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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203rad/s

203rotations/s

203rpm

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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