分压器电路是高中电路问题的重点内容,在理论计算和实验应用中占有极其重要的地位,但过程分析较为繁杂,学生不易弄会弄通,因而成为教学中的难点。本文从分析分压器电路中电流的变化入手,用等效演绎的思想,例析三道常见但学生不易接受的题目,供读者参考。问题图1所示电路中,电源 The voltage divider circuit is the key content of the high school circuit problem, which occupies an extremely important position in the theoretical calculation and experimental application. However, the process analysis is complicated and the students are not easy to get through, which becomes a difficult point in teaching. This article starts with the analysis of the current change in the voltage divider circuit, and uses the idea of ​​equivalent deduction to analyze three common but unacceptable topics for students’ reference. Problem in the circuit shown in Figure 1, power