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 batte 7 o)quvsq:9s ary, a f+cxfb oy o)zqehl:p1u+ ,2)r wxy05zn ideal ammeter, a switch and three resistors are connected as shown. With the switch open as shown in the diagram the ammeter reads 2.0 amperes r 0wh zybl+q )zoc f2 uxx5ye1,)+ofp:.
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
|