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

The magnetic flux linked with a coil, in webers is given by the equation `phi=3t^(2)+4t+9`. Then, the magnitude of induced emf at t = 2 s

A

2 V

B

4V

C

8 volt

D

16 V

Text Solution

Verified by Experts

The correct Answer is:
D
`e = (d phi)/(dt) = d ((3 t^2 + 4t + 9))/(dt) = 6t + 4 `
`= (6 xx 2) + 4 ( t = 2s , "given")`
`e = 16 "volt"`
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