用如图甲所示的电路可以测量一个未知电阻的阻值采用的物理思想方法可称为“等效替代法 .其中rx为待测电阻r为电阻箱如图乙所示可通过调节 Template




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tomski用如图甲所示的电路可以测量一个未知电阻的阻值采用的物理思想方法可称为“等效替代法 .其中rx为待测电阻r为电阻箱如图乙所示可通过调节 coloring