测电源电动势和内阻是高中物理教学的重点,其中对电动势和内阻进行误差分析是教学重点也是难点。在大多数物理参考书中对该误差都有过分析,常见的方法有:公式推导法、图像比较法、等效电源法等。本文不在这里重复这些方法的原理,为此本文提出了一种误差分析的新方法。实验一电压表电流表法(电流表内接) Measuring power emf and internal resistance is the focus of high school physics teaching, of which the emf and the resistance of the error analysis is the teaching focus is difficult. This error has been analyzed in most physical reference books. Common methods include formula derivation, image comparison, and equivalent power methods. This article does not repeat the principle of these methods here, this paper presents a new method of error analysis. Experiment a voltmeter ammeter method (ammeter in-line)