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The magnetic flux linked with a coil var...

The magnetic flux linked with a coil varies with time as `phi=3t^(2)+4t+9` webers. The induced emf at `t=2s` is

A

4 V

B

3V

C

16 V

D

9V

Text Solution

Verified by Experts

The correct Answer is:
C
`q = 3t^2 + 4t + 9`
`|v| = - |(d varphi)/(dt)| = 6t + 4`
`= 6 xx 2 + 4 = 12 + 4 = 16 "volt"`
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