A 126 v battery is in a circuit with a 300 mh inductor and, Ask an Expert

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A 12.6 V battery is in a circuit with a 30.0 mH inductor and a 0.150 resistor, as in Active Figure 20.27. The switch is closed at t = 0.

(a) Find the time constant of the circuit.

(b) Find the current after one time constant has elapsed.

(d) What's the rate of change of the current after one time constant?

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