本题目来源于试卷: .Resistor.，类别为 美国物理杯赛(Physics Bowl)
[单选题]
99.31: Wire Y is made of the same u ds6 -ghco8lvi+-v 6nr;d ,eematerial but h4kyd1c2 g -hqo 97d2mt)gxgjy as twice the diameter and half the length of wire X. If wired9g2 t - m4yxh2gyqgjcdk7o )1 X has a resistance of R then wire Y would have a resistance of
A. $R/8$
B. $R/2$
C. $R$
D. $2R$
E. $8R$
参考答案: A
本题详细解析:
暂无
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