用如图甲所示的电路可以测量一个未知电阻的阻值其中rx为待测电阻r为电阻箱s为单刀双掷开关r为定值电阻.某同学用该电路进行实验主要 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其中rx为待测电阻r为电阻箱s为单刀双掷开关r为定值电阻.某同学用该电路进行实验主要 coloring