In the circoit shown in Fig. 30.27, ? = 60.0 V, R1 = 40.0 n, R2 = 25.0 n, and L = 0.300 H.(a) Switch S is closed. At some time t afterward the current in the inductor is increasing at a rate of di/dt = 50.0 A/s. At this instant, what are the current i1 through R1 and the current i2 through R2?(b) After the switch has been closed a long time, it is opened again. lust after it is opened, what is the currentthroughR,?

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