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]
05.50: A series RL circuit is shown. 0hjj2nfkw+ .s-q y2l;po;eluWhic a rha y q5z/b7cy13iy+h of the suggested changes in the circuit (labeled I, II, and III) would resul / q71 3+iazachby yr5yt in the initial voltage across the inductor (at the instant that the switch is closed) to be double what it is for the circuit shown?
I. Reduce the resistance in the circuit to R0/2.
II. Double the inductance in the circuit to 2L0.
III. Add a second identical inductor to the circuit in parallel with the first inductor.
A. Only change I
B. Only change II
C. Only change III
D. Changes I and II must be done together
E. None of the changes achieves the desired result.
参考答案: E
本题详细解析:
暂无
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