.Resistor. (id: 169e12a08)

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 qq-br::7u e:lzy2ou l ammeter, w7lxjd -y. r2qh 3u9uja switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperesqjjwhd-l79yxru u.23 .
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

微信扫一扫，分享更方便