欲使静电演示实验获得成功,除了注意操作方法外,还应注意保持仪器的绝缘性能。影响绝缘性能的因素主要是选用的材料、干燥程度和表面洁浄情况。在这些方面,我们作了一些试验,效果较好,现介绍如下,供同志们参考。 1.验电器如果经擦拭和烘烤后,绝缘效果仍很差(箔片张开以后停留不住),这时可以换上一个收音机的旋钮代替瓶塞。代替的方法如图1所示,将旋钮A的中心圆孔οο′钻通,插入 To make the electrostatic demonstration experiment successful, in addition to pay attention to the operation method, but also should pay attention to maintain the insulation performance of the instrument. The factors that affect the insulation performance are mainly selected materials, degree of dryness and surface cleanliness. In these areas, we have conducted some experiments and achieved good results. We will introduce them below for reference by our comrades. 1. Electroscope if after wiping and baking, the insulation effect is still poor (foil open after staying), then you can put a radio knob instead of the stopper. Instead of the method shown in Figure 1, the knob A center hole οο ’through, insert