“测量电源的电动势和内阻”实验是高中物理中最重要的学生实验之一,其中对实验电路系统误差的分析是教学的重点也是难点.处理这个知识点一般有解析法、图解法和等效电源法等方法.但是解析法运算太复杂、图解法理解太抽象而不常被学生所运用,等效电源法虽然可以很直接地判断测量值与真实值的大小关系,也可以直接写出测量值的表达形式,但是学 “Measurement of electromotive force and internal resistance ” experiment is one of the most important students in high school physics experiment, of which the experimental circuit error analysis is the teaching of the key and difficult.To deal with this knowledge points are generally analytical method, graphic method And equivalent power method method, etc. However, analytical method is too complicated, graphic method is too abstract to understand and not often used by students, although the equivalent power method can directly determine the measured value and the real value of the size of the relationship can also be directly Write out the expression of the measurement, but learn