.Resistor. (id: 1ea595757)

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

[单选题]
02.22: An ideal battery, an ideal jo(vr 7 2 c68+ntlr der7erfuq)3xst1ammeter, a sw 3e4 p)uh7wqelitch and three resistors are connected as shown. With the switch open as shown in the diagram the ammee7e4lqwuh )p3 ter reads 2.0 amperes.
With the switch open, what must be the voltage supplied by the battery?

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


参考答案:  D


本题详细解析: 暂无

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