伏安法测电源的电动势和内阻是高中物理的重要实验之一,也是近几年高考的热点。那么,如何减小该实验中的系统误差呢?结合教学实践,笔者用五种思路来分析此问题,具体分析如下:思路1等效内阻法在此实验中,根据电压表和电流表的位置关系,理论上有两种电路连接方式,如图1(对R来说电流 Voltammetry power emf and internal resistance is one of the important experiments in high school physics, but also hot in recent years college entrance examination. So, how to reduce the experimental system error? Combined teaching practice, the author uses five ideas to analyze this problem, the specific analysis is as follows: Idea 1 equivalent internal resistance method In this experiment, according to the voltmeter and ammeter position Relationship, in theory, there are two circuit connections, as shown in Figure 1 (R for current