对中学生来说电源内电压是个比较难理解的概念,在教学中我们以丹聂耳电池为例指导学生理解电源内电压的含义收到了较好的效果。我们的讲述方法是: 一、丹聂耳电池的结构。图1是丹聂耳电池的剖面图。铜极和锌极分别浸在硫酸铜与硫酸锌溶液中,中间的隔板 For the middle school students, the voltage in the power supply is a relatively difficult concept to understand. In the teaching, we used the Daniel battery as an example to guide students to understand the meaning of the voltage in the power supply and received good results. Our approach is as follows: 1. The structure of the Daniel battery. Figure 1 is a sectional view of a Danielle battery. The copper and zinc electrodes were immersed in a solution of copper sulfate and zinc sulfate, respectively.