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电源电动势和内阻的测量是中学物理实验教学中一个重要的内容。一般说来,测电源电动势和内阻的方法有传统的伏安法、电势差计法。使用伏安法,由于电表的影响,使得测量结果存在着系统误差,而使用电势差计法,则
The measurement of power EMF and internal resistance is an important part of physics experiment teaching in middle schools. Generally speaking, there are traditional methods of volt-ampere measurement and potential difference metering for measuring the power emf and internal resistance. Using voltammetry, due to the influence of the meter, there is a systematic error in the measurement result, and using the potential difference meter method,