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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
(4)
`e=|(dphi)/(dt)|=12t-5`
At `t=0.25s,e=2V`
`:.i=e/R=0.2A`
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NARAYNA-ELECTROMAGNETIC INDUCTION-EXERCISE-1 (C.W)
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