本题目来源于试卷: Physics Unit18: Electric Currents，类别为 通用国际物理
[单选题]
Consider two copper wi/3mz25hiy jv ab hm8e.res. One h9p.hns /bh,a/la 3u dc--nulqas twice the length and twice the cross-sectional arp-h.n -,3a9 sc//l duaqblhunea of the other. How do the resistances of these two wires compare?
A. Both wires have the same resistance.
B. The longer wire has twice the resistance of the shorter wire.
C. The longer wire has four times the resistance of the shorter wire.
D. none of the given answers
参考答案: A
本题详细解析:
暂无
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