The magnetic flux phi (in waber ) in a...

The magnetic flux `phi` (in waber ) in a closed circult of resting ` 10 Omega` varies with t ( in second) according to equation `phi = 6t^(2) - 5 t+ 1`. The magnitude of induced at `t = 0.25 s`.

`1.2 A`

`0.8 A`

`0.6 A`

`0.2 A`

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