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The magnetic flux phi (in weber ) in a c...

The magnetic flux `phi` (in weber ) in a closed circuit of resistance 10`Omega` varies with time t (in secnod) according to equation `phi=6t^(2)-5T+1`. The magnitude of induced current at `t=0.25` s is

A

`1.2` A

B

`0.8` A

C

`0.6` A

D

`0.2` A

Text Solution

Verified by Experts

The correct Answer is:
D
Induced emf, `e=|(dphi)/(dt)|=|12t-5|`
`"At "t=0.25srArre=2V`
`therefore"Induced current, i"=(e)/(R)=0.2A`
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