The switch in the circuit shown in Figure P21.64 has been open for a long time. The

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The switch in the circuit shown in Figure P21.64 has been open for a long time. The resistors in the circuit each have a value of 50Ω, the inductors each have a value of 40 mH, and V = 12 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? See Problems 44 and 45.

 R2 L2 A ll R13 L3 ell -T Figure P21.64

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