The switch in the circuit shown in the figure has been open for a long time. The resistors in the circuit each have a value of 60 Ω, the inductors each have a value of 60 mH, and  V = 10 V. (a) What is the total equivalent inductance of the circuit between points A and B? (b) What is the current through R1 the instant after the switch is closed? (c) What is the current through R1 long after the switch has been closed

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