3
Question
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 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:
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Solution
The correct option is D 400mV
Answer is D
From Faraday's law, we know that E=−ndϕdt E=−nAdBdt∴cosθ=1
E=−1000×0.010.01×4×10−4=400mV
Answer is D
From Faraday's law, we know that E=−ndϕdt
E=−nAdBdt∴cosθ=1
E=−1000×0.010.01×4×10−4=400mV
E=−1000×0.010.01×4×10−4=400mV
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