Q20
A switch, a 220 Ω resistor, and a 60 mH inductor are in series across a 20 V battery. What is the current through the inductor two time constants after the switch is closed?
A.
91 mA
B.
78 mA
AnswerC.
57 mA
D.
400 mA
Answer: Option B
Solution
Answer: Option B
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