静电学内容比较抽象，需向学生做一些直观演示，传统仪器价格昂贵，难以普及。我们可利用身边的一些材料（易拉罐等）自制教具来向学生演示，从而使静电感应、静电作用、尖端放电等变得生动有趣，通俗易懂。下面就介绍几则，供大家参考。１静电单摆a．仪器装置如图１。b．制作 The content of electrostatics is relatively abstract, and students need to make some intuitive demonstrations. Traditional instruments are expensive and difficult to popularize. We can use some of our own materials (such as cans, etc.) to make presentations to students so that electrostatic induction, electrostatic effects, and cutting-edge discharges can be vivid and easy to understand. The following introduces a few for your reference. 1 static pendulum a. Instrument device shown in Figure 1. b. Making