本题目来源于试卷: Electricity and Circuits: Resistor，类别为 美国物理杯赛(Physics Bowl)
[单选题]
03.23: A cylindricalevt tb1*gpl- s p6):wk v 3/fc(pi rmx/hb6x :7bmwan4 resistor has length L and radius r. This piece of material is then drawn so that it is a cylinder with i(x34 6x: wabvbnm /fmrhpc 7/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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