The time constant of an \( L R \) circuit is \( 40 \mathrm{~ms} \). The circuit is connected at ...

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The time constant of an \( L R \) circuit is \( 40 \mathrm{~ms} \). The circuit is connected at \( t=0 \) and the steady-state current is found to be \( 2 \cdot 0 \) A. Find the current at (a) \( t=10 \mathrm{~ms} \) (b) \( t=20 \mathrm{~ms} \), (c) \( t=100 \mathrm{~ms} \) and (d) \( t=1 \mathrm{~s} \).
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