In the circuit shown in Fig. P30.69, and (a) Switch S is

Chapter 30, Problem 30.70

(choose chapter or problem)

In the circuit shown in Fig. P30.69, and (a) Switch S is closed. At some time t afterward, the current in the inductor is increasing at a rate of At this instant, what are the current through and the current through (Hint: Analyze two separate loops: one containing and and the other containing and L.) (b) After the switch has been closed a long time, it is opened again. Just after it is opened, what is the current through

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