A 13-V battery is connected in series with a switch, resistor and coil. If the circuit's time constant is 1.2 × 10^?4 s and the final steady current after the switch is closed becomes 2.5 A, what is the value of the inductance?
a. 3.9E–3 H
b. 6.2E–4 H
c. 2.3E–1 H
d. 2.7E–3 H
e. 2.3E–5 H
b
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