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Questions  

The coil of dynamo is rotating in a magnetic field. The developed induced e.m.f. changes and the number of magnetic lines of force also changes. Which of the following condition is correct

a
Lines of force minimum but induced e.m.f. is zero
b
Lines of force maximum but induced e.m.f. is zero
c
Lines of force maximum but induced e.m.f. is not zero
d
Lines of force maximum but induced e.m.f. is also maximum

detailed solution

Correct option is B

e∝dϕdt; if ϕ→ maximum then e→ minimum.

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