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