本题目来源于试卷: --Inductors，类别为 美国物理杯赛(Physics Bowl)
[单选题]
10.45: For the ideal RL m p e;vq3/ivx/grel)7 ejo(ka3 3ptl 8 circu 0+-ugoyfb l q9it shown, the resistance is R=10.0Ω, the inductance qgbu +9fl0o-y is L=5.0 H and the battery has voltage $\xi_{bat}$ = 12 vlots. Some time after the switch S in the circuit is closed, the ammeter in the circuit reads 0.40 A. At what rate is energy being stored by the inductor at this instant (in Watts)?
A. 0.40
B. 1.0
C. 2.0
D. 3.2
E. 4.8
参考答案: D
本题详细解析:
暂无
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