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The magnetic flux linked with a coil, in...

The magnetic flux linked with a coil, in weber, is given by the equation `f=3T^(2)+4t+9`. Then the magnitude of induced e.m.f. at `t=2` second will be

A

2 volt

B

4 volt

C

8 volt

D

16 volt

Text Solution

Verified by Experts

The correct Answer is:
D
`phi = 3t^2 +4t +9`
`|e| = (dphi)/(dt) =6t +4` [by Farady.s 2nd law]
`|e|_(t=2)=12+4=16` volt
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