Magnetic Flux linked with a coil is phi ...

Magnetic Flux linked with a coil is `phi = 5 t^2 + 2 t + 3 ` where t is in second and `phi` is in weber. At time t =1 sec., the value of induced emf is ........... volt.

A

`1.2`

B

`6`

C

`14`

D

`12`

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