测定电源电动势及内阻是高中物理电学中一个非常重要的实验,实验中所涉及的实验设计原理、实验误差分析,图像问题则往往成为高考考查的重点和学生学习的难点,本文就这一问题作初步探索,试图破解这一学习与教学中的难点。 Determination of electromotive force and internal resistance is a very important experiment in high school physics and electricity. The experimental design principles, experimental error analysis and image problems involved in the experiment often become the focus of college entrance examination and the difficulty of student learning. In this paper, As a preliminary exploration, trying to solve this learning and teaching difficulties.