A coil of circular cross-section having 1000 turns and 4cm2 face area is placed with its axis parallel to a magnetic field which decreases by 10−2Wb−m−2 in 0.01s. The e.m.f. induced in the coil is:
A
4mV
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B
0.4mV
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C
200mV
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D
400mV
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Solution
The correct option is D400mV Answer is D From Faraday's law, we know that E=−ndϕdt