正确进行串、并联电路的分析,是初中学生学好电学知识的基础和关键.但对初学者来说,往往感到困难.笔者通过多年的教学实践,总结并运用“电极移位”进行电路分析的教学,效果颇佳.所谓电极移位,就是将电源正极(以下简称“+”)和负极(以下简称“-”).沿电路中的导线和一些不分压(理想)器件,如开关、电流表等移至导体两端,最后根据导体两端所得的“+”、“-”情况,可以准确判断导体的连接情况. Correct analysis of series and parallel circuits is the basis and key for junior high school students to learn electrical knowledge. However, for beginners, it is often difficult. The author summarizes and uses “electrode shifting” to conduct circuits through years of teaching practice. Analytical teaching, the effect is quite good. The so-called electrode shift, is the power supply positive (hereinafter referred to as “+”) and negative (hereinafter referred to as “-”). Along the wire in the circuit and some no pressure (ideal ) Devices, such as switches, ammeters, etc., are moved to both ends of the conductor. Finally, according to the “+” and “-” conditions obtained at both ends of the conductor, the conductor connection can be accurately determined.