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用电压表和电流表测电源电动势和内阻,是重要的电学实验。这个实验因为电压表和电流表的内阻而产生系统误差。因为系统误差的存在,测量值与真实值之间总是存在着始终偏大或者始终偏小的关系。利用电压表和电流表能否测出电源电动势和内阻的真实值呢?笔者就这一问题介绍几种方法来间接测出电源电动势与内阻的真实值。
Voltmeter and ammeter to measure the electromotive force and resistance, is an important electrical experiment. This experiment produces systematic errors due to the internal resistance of the voltmeter and the ammeter. Because of the systematic error, there is always the relationship between the measured value and the true value is always too large or always small. The use of voltmeter and ammeter can determine the true value of the power electromotive force and resistance it? The author describes several issues on this issue to indirectly measure the true value of the power electromotive force and internal resistance.