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材料
by
Teacher Physics
18 years ago
708
探究导体电阻大小的因素
探讨导体电阻的影响因素时,材料、横截面积、长度和温度是关键变量。为了研究这些因素对电阻的影响,可以通过保持其他条件不变,分别改变其中一个因素来观察电阻的变化。例如,要研究材料对电阻的影响,可以在保持导体横截面积和长度不变的情况下,使用不同材料的导体进行实验。类似地,为了研究横截面积的影响,可以在保持材料和长度不变的情况下,改变导体的横截面积。研究长度的影响时,可以在保持材料和横截面积不变的情况下,改变导体的长度。
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探究导体电阻大小的因素
温度
横截面积
长度
材料
结论
操作:____,____不变,改变___,研究带电阻与材料的关系