A certain inductor has an indutance of 0.50H and a resistance of 2.0. It is placed in series with a swtich, a 12.0-V battery and a 4.0 ohms resistor. Find the time constant of the circuit and the energy stored in the inductor.
0.83s and 100J
0.032s and 20J
0.47s and 5J
0.083s and 1J
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