Question

# The magnetic flux linked with a coil varies as $$\phi =3t^2+4t+9$$. The magnitude of the emf induced at $$t=2$$ seconds is?

A
8 V
B
16 V
C
32 V
D
64 V

Solution

## The correct option is B $$16$$ V$$\phi =\dfrac{d\theta}{dt}$$$$=6t+4=6(2)+4$$$$=16V$$.PhysicsNCERTStandard XII

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