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A coil of resistance 400Omega is placed ...

A coil of resistance `400Omega` is placed in a magnetic field. If the magnetic flux `phi` (wb) linked with the coil varies with time `t` (sec) as `f=50t^(2)+4`, the current in the coil at `t=2` sec is

A

`0.5A`

B

`0.1A`

C

`2A`

D

`1A`

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The correct Answer is:
A
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