在高中物理实验中,电学实验是重点,也是难点,尤其是设计性实验,它对学生的知识掌握程度和分析综合能力要求比较高。设计性实验题目千变万化,但实验的基本原理和方法是不变的,例如许多设计性实验器材中常常提供定值电阻,笔者根据自己的教学经验,从帮助学生解题的角度出发,谈谈在电学设计性实验中定值电阻的作用。 In high school physics experiment, electrical experiment is the key, but also difficult, especially the design experiment, which has a high knowledge of students and the ability to analyze comprehensive ability. The design of experimental topics ever-changing, but the basic principles and methods of experiments is unchanged, for example, many design experimental equipment often provide the value of resistance, the author based on their own teaching experience, from the perspective of helping students solve problems, talk about The role of fixed resistance in electrical design experiments.