LR Circuits: A 1.5-H inductor is connected in series with a 200-? resistor through an ideal 15-V dc power supply and an open switch. After closing the, what is the maximum energy that will be contained in the inductor?
A. 1.2 mJ
B. 2.2 mJ
C. 3.2 mJ
D. 4.2 mJ
E. 5.2 mJ
Answer: D
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