--Inductors (id: f970895d9)

本题目来源于试卷: --Inductors，类别为 美国物理杯赛(Physics Bowl)

[单选题]
08.41: The circuit shown has been operating for a long time. The instarr)( w (:vlubknt after tv ):rwu lbr(k(4g xuz6a/+t l u 9xo(1c1ytfszhe switch in thexs tzu/1golaytz1fc +9u(4x6 circuit labeled S is opened, what is the voltage across the inductor $V_L$ and which labeled point (A or B) of the inductor is at a higher potential? Take $R_1\:=\:4.0\Omega$, $R_2\:=\:8.0\Omega$, and L = 2.5H.

A. $V_L$ = 30V; Points A and B are at equal potentials.
B. $V_L$ = 12V;Point A is at the higher potential.
C. $V_L$ = 12 V;Point B is at the higher potential.
D. $V_L$ = 6V;Point A is at the higher potential.
E. $V_L$ = 6V;Point B is at the higher potential


参考答案:  E


本题详细解析: 暂无

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