Flux \( (\phi) \) (in weber) in a closed circuit of resistance \( 2...

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Flux \( (\phi) \) (in weber) in a closed circuit of resistance \( 20 \Omega \) varies with time \( t \) (in second) according to
\( \mathrm{P} \)
equation \( \phi=6 t^{2}-5 t+1 \). The magnitude of the
W
induced current at \( t=0.25 \mathrm{~s} \), is
(1) \( 1.2 \mathrm{~A} \)
(2) \( 0.8 \mathrm{~A} \)
(3) \( 0.6 \mathrm{~A} \)
(4) \( 0.1 \mathrm{~A} \)
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