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新编高二物理教材中新增一个学生实验《电场中等势线的描绘》,很多中学缺少必要的实验器材,特别是导电纸,而且一般不易买到,即使能买到价格也较贵。这里介绍一种自制导电纸的方法,这一制法所用材料是废干电池中的碳棒和胶水,很容易找到,而且制作过程简单。我们用这种导电纸,做了多次实验,描绘出的等势线与理论相符,效果较好,现将具体制作过程介绍如下:
The new high school physics textbook has added a student experiment “A description of the electric field in the middle line”. Many secondary schools lack the necessary experimental equipment, especially conductive paper, and they are generally not easy to buy, even if they can be bought at a higher price. Here is a method of self-made conductive paper. The material used in this method is carbon sticks and glue in dry batteries. It is easy to find and the production process is simple. We used this kind of conductive paper to do a lot of experiments. The equipotential line drawn out is in line with the theory. The effect is good. Now we will introduce the specific production process as follows: