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A coil of resistance 400 is placed in a ...

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

A

`0.1 A`

B

`2 A`

C

`1 A`

D

`0.5 A`

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