在伏安法测电阻的实验中,待测电阻Rx约为200Ω,电压表V的内阻约为2

在伏安法测电阻的实验中,待测电阻Rx约为200Ω,电压表V的内阻约为2kΩ,电流表A的内阻约为10Ω,测量电路中电流表的连接方式如图(a)或图(b)所示,计算结果由计算得出,式中UI分别为电压表和电流表的读数;若将图(a)和图(b)中电路测得的电阻值分别记为Rx1Rx2,则

    (填Rx1Rx2)更接近待测电阻的真实值,且测量值Rx1     (填大于等于小于)真实值,测量值Rx2      (填大于等于小于)真实值。

答案

Rx1      ②大于       ③小于

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