本题目来源于试卷: Internal Resistance，类别为 美国物理杯赛(Physics Bowl)
[单选题]
10.27: The circuit s t1 gl5td y8/dlh u/0s,zham8z d ckh+ x*own contains a battery (of emf $V_bat$) with an internal resistance r connected to a rheostat (variable resistor). When the resistance of the rheostat is increased, which of the following statements is true?
A. The terminal voltage $V_a−V_b$ increases.
B. The current through the ammeter in the circuit increases.
C. The power associated with the internal resistance increases.
D. The potential difference across the rheostat decreases.
E. None of the above statements is true.
参考答案: A
本题详细解析:
暂无
| 
