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In the circuit shown below, the switch S is closed at t=0. Find the current in the inductor and the time constant for the circuit for t > 0.
7. In the circuit shown below, condition at t=0, the switch is open if t < 0 and closed if t > 0.
8. In the circuit shown below, the switch changes position from A to B at t=0. Assume steady-state conditions for t > 0. Determine the voltage with polarity across the resistor below, before and after the switch change.