Electric Circuits and Networks

10.3 SERIES RL CIRCUIT WITH UNIT STEP INPUT – POWER SERIES SOLUTION

The current in the RL circuit would have gone to 1/R A immediately on unit step voltage application had the inductance in the circuit been zero. Moreover, the current in the circuit would have tracked the applied voltage without any delay for any applied voltage waveform in that case. Thus, we see that the presence of inductance in the circuit introduces a delay in the tracking performance of the circuit current with respect to applied voltage. In addition, the inductor does not ever permit the current to reach the level that it would have reached had the inductance been zero. For example, the current in the circuit with unit step voltage input does not ever reach 1/R A; it can ...