(Solved): The current in the RL circuit shown below reaches four-fifths its maximum value in \( 2.75 \mathrm{ ...

The current in the RL circuit shown below reaches four-fifths its maximum value in \( 2.75 \mathrm{~ms} \) after the switch \( \mathrm{S}_{1} \) is thrown. (a) Determine the time constant of the circuit (in ms). * ms (b) Determine the resistance of the circuit (in \( \Omega \) ) if \( L=500 \mathrm{mH} \). \( \Omega \)