“伏安法测电阻”和“伏安法测电功率”是初中物理的两个重要实验,也是中考的热点。考查这两个实验涉及的内容包括实验的各个环节及学生运用发散思维灵活分析问题的能力。在做测量电阻的实验中,一般需要测量三次,然后通过求平均值来减小误差。然而我们在实验的过程中会发现,同样是用伏安法测定值电阻和小灯泡的电阻,测出的三个定值电阻的阻值数据相差很小,一般在0.1~0.3Ω之间,而测出的小灯泡的阻值相 “Voltammetry resistance ” and “Voltammetric power measurement ” is two important experiments in junior high school physics, is also a hot spot in the exam. Examining these two experiments involves all aspects of the experiment and students’ ability to analyze problems flexibly using divergent thinking. In the experiment of measuring resistance, it is generally necessary to measure three times and then reduce the error by averaging. However, during the experiment, we found that the resistance values ​​measured by voltammetry and the resistance of the small bulb were the same. The resistance values ​​measured by the three fixed resistors showed a small difference, generally between 0.1 and 0.3Ω, The measured light bulb resistance phase