First slide

Magnetic flux and induced emf

Question

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

Moderate

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

Solution

$e \propto \frac{dϕ}{dt}; if ϕ \to maximum then e \to minimum.$

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