本题目来源于试卷: .Resistor.，类别为 美国物理杯赛(Physics Bowl)
[单选题]
03.23: A cylindrical resistor has length L and radius r. Thok4y6w pr/ et)is piecik9d 3 x(wnyn(quj7u:e of material is then drawn so thatn9u( ux(j wn7yd :3kiq it is a cylinder with new length 2L. What happens to the resistance of this material because of this process?
A. the resistance is quartered.
B. the resistance is halved.
C. the resistance is unchanged.
D. the resistance is doubled.
E. the resistance is quadrupled.
参考答案: E
本题详细解析:
暂无
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