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 wir9l 9)md g:m0jeuw.kfx-yh 3ifes each carrying a current of 3.0 A. - e i4hb pc(f*z5joje1s(p8x f+7vstaOne wire has twice the diameter of the other. The ratio of the drift velocity in the smaller diamet v bjasiop*8z phexfc+(5 -(4es1fj7t er wire to that in the larger diameter wire is
A. 4:1
B. 2:1
C. 1:2
D. 1:4
参考答案: A
本题详细解析:
暂无
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