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, t hgpox 15p ii(+9l)s ixhe ammeter reading is initially I. The switch i ln,g7m b5n *flz*qlp+ n lzgn+ ll75pbm q,n**fthe circuit then is 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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