Magnetic flux (in weber) in a closed circuit of resistance \( 20 \Omega \) varies with time \( t...

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Magnetic flux (in weber) in a closed circuit of resistance \( 20 \Omega \) varies with time \( t(\mathrm{~s}) \) as \( \phi=8 t^{2}-9 t+5 \). The magnitude of the induced current at \( t=0.25 \mathrm{~s} \) will be \( \mathrm{mA} \)
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