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 material but has twicebmf9z6/yk 4w npog, i6eqc2n(fs8j+g9s uoiz 055h q -cmbu8 w the diameter and half the length of wire X. If wire X has a resistance of R then wire Y wio(88g5b0 u s m+2-w5fnq zhjc9squceould 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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