导电纸是做好“电场中等势线的描绘”实验的关键器材。可是,性能优良的导电纸在市面上很难买到,多数情况下只能自制或寻找一些代用品。很多刊物上都介绍了一些导电纸的制作方法,虽然经济,但是有的方法难以使每张导电纸性能保持一致,有的方法在实验中又容易弄破导电纸,并且准备工作都较麻烦。为此,我在实验中用光电誊影纸 Conductive paper is the key to doing a good job of “depicting” the electric field’s medium potential line. However, conductive papers with excellent properties are difficult to buy on the market, and in most cases, only self-made or looking for substitutes is available. In many publications, some methods for producing conductive papers have been introduced. Although economical, some methods are difficult to keep the performance of each conductive paper consistent. Some methods can easily break conductive paper during the test, and preparation work is troublesome. For this purpose, I used photoelectric shadow paper in the experiment.