Magnetic flux \( \phi \) (in weber) linked with a closed circuit of...

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Magnetic flux \( \phi \) (in weber) linked with a closed circuit of resistance \(10\) ohm varies with time \( t \) (in seconds) as \( \varphi=5 t^{2}-4 t+1 \)
The induced electromotive force in the circuit at \( t=0.2 \)
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