Electricity and Circuits: Inductors (id: f970895d9)

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

[单选题]
08.41: The circuit show;.;cc9 k cwr,k 8 0rhvcmjejz 4va+jg-n 17ote1aph,)pi g9d- ab a7 tklhas been operating for a long time. The instant after the switch in the circuit labeled S is opened, what is the voltage ace,d 1h-g iklbo7tp7p9aa1at )ross 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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