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伏安法测量电阻是中学物理实验的必开内容,该实验存在着电流表内外接法的实验误差。笔者在从事中学物理教材教法的实验教学中感觉到,将此内容稍许扩充一些,对未来中学教师及中学的高材生的培养是大有好处的。
Volt-ampere measurement of resistance is a must-have content for middle school physics experiments. There is an experimental error in the internal-external method of ammeter. The author feels that in the experimental teaching of middle school physics textbook teaching methods, this content is slightly expanded, and it is of great benefit to the cultivation of future high school teachers and high school students.