方法一:
1、将电源、开关、滑动变阻器、待测电阻、电流表串联起来;
2、将电压表并联在待测电阻两端.
方法二:
1、将电源、开关、滑动变阻器、待测电阻与电流表顺次串联起来;
2、将电压表与待测电阻和电流表的串联部分并联.
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