.Resistor. (id: 7e83db416)

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

[单选题]
02.21: An ideal battery, an ideal ammeter, a switch and(n 2kiq0r1mb9mw itf5di4 d4 rzsg k+5 three rest(*5 aax.x 4b6c c,pu i;inrezistors are connect5xc caex in zr4 p(u,a6i*b;.ted as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes.
With the switch open, what would be the potential difference across the 15 ohm resistor?

A. $30V$
B. $40V$
C. $60V$
D. $70V$
E. $110V$


参考答案:  A


本题详细解析: 暂无

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