.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 ; gbjrnc )cr(.4rpnnb,f6,grswitch and three -1j 0pb5 h1as9q,dr d 8rmrcpfresistors are conneaf dps1,qj08dcr-195p br mrh cted 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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