本题目来源于试卷: Electricity and Circuits: Resistor，类别为 美国物理杯赛(Physics Bowl)
[单选题]
02.21: An ideal battery, an i8b-qp5 (od oze8 1b*m zga1rsriw z p4txf0ezpz7;dk1 .5 l:iideal ammeter, a switch and three resistors are connected lx z0t: we z.r1pd4z;kif57 pias 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. $30 V$
B. $40 V$
C. $60 V$
D. $70 V$
E. $110V$
参考答案: A
本题详细解析:
暂无
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