如图是探究影响导体电阻大小的因素时可共选用的几种导体，其中A、B、C都是镍铬合金丝，D是锰铜丝；A、C、D的长度相等，B的长度是A的两倍；A、B、D的横截面积相等，C的横截面积是A的两倍．如需探究导体_刷题宝

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如图是探究影响导体电阻大小的因素时可共选用的几种导体，其中A、B、C都是镍铬合金丝，D是锰铜丝；A、C、D的长度相等，B的长度是A的两倍；A、B、D的横截面积相等，C的横截面积是A的两倍．如需探究导体的长度对电阻的影响，可以选择____（选填字母A、B、C、D）；选择A、C，可以探究导体的____对电阻的影响．

上一题下一题 0.0难度选择题更新时间:2019-07-31 09:46:32

答案(点此获取答案解析）

A、B,横截面积

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