测电源的电动势和内阻是新教材高中必修的实验,大部分学生在分组实验后,对实验中一些常规的问题仍困惑不解.如:为什么测电源的电动势和内阻也需要考虑电流表、电压表的不同连接方式?不同的连接方式中,如何作测量值和真实值的U—I图像进行误差分析?对此,笔者通过数形结合方法处理,既能调 Measurement of the electromotive force and resistance of the power of the new textbook compulsory high school, most students in the experimental group, some of the conventional problems are still puzzled.For example: Why measure the power of the electromotive force and resistance also need to consider the ammeter, Different connection ways of voltmeter? How to make the error analysis of the U-I image of measured value and real value in different connection ways? In this regard,