LR Circuits: A 25-mH inductor is connected in series with a 20-? resistor through an ideal 15-V dc power supply and a switch. If the switch is closed at time t = 0 s, what is the current when t = 2.0 ms?
A. 0.40 A
B. 0.50 A
C. 0.60 A
D. 0.70 A
E. 0.80 A
Answer: C
Physics & Space Science
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