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The normal magnetic flux passing through...

The normal magnetic flux passing through a coil changes with time according to following equation
`phi = 10t^(2) + 5t + 1`
where `phi` is in milliweber and t is in second. The value of induced e.m.f. produced in the coil at `t = 5s` will be –

A

zero

B

1 V

C

2 V

D

0.105 V

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