本题目来源于试卷: Combine Problems,类别为 美国物理杯赛(Physics Bowl)
[单选题]
07.33: For the circuit shown, yj,dj.l 1 +ailthe ammeter reading is initi ybga e/o zya8 6n4)q 32g1posgally I. The switch in the circuit then gygq) 3za84aseo bng6 y /2po1is closed. Consequently:

A. The ammeter reading decreases.
B. The potential difference between E and F increases.
C. The potential difference between E and F stays the same.
D. Bulb #3 lights up more brightly.
E. The power supplied by the battery decreases.
参考答案: C
本题详细解析:
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