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Question

The coil of area 0.1 m2 has 500 turns. After placing the coil in a magnetic field of strength 4× 104Wb/m2, if rotated through 90 in 0.1 s, the average emf induced in the coil is

A
0.012 V
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B
0.05 V
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C
0.1 V
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D
0.2 V
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Solution

The correct option is D 0.2 V

e=NBA(cosθ2cosθ1) t
=500× 4× 104× 0.1(cos90cos0)0.1=0.2V


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