起电盘是利用静电感应原理产生电荷的一种装置。它是由意大利物理学家伏打在1775年发明的。起电盘是由一块硬橡胶平板(即底盘)和装有硬橡胶手柄的金属圆盘组成。在教学中,起电盘本身不仅可以直接演示静电感应现象,而且可以做为辅助电源演示其它的静电现象。但是,由于制作起电盘的硬橡胶绝缘性能差,易漏电,起电效果不好,即使在天气干燥的情况下,每次起电产生的电荷也较少,使其应用受到很大限制。现代塑料工业生产了许多绝缘性能好、非常容易起电而且能产生大量电荷的新材料。如聚四氟乙烯(即塑料王)、有机玻璃、聚苯乙 Power plate is the use of electrostatic induction charge generated by a device. It was invented by the Italian physicist Voltaire in 1775. Power plate is composed of a hard rubber plate (ie chassis) and equipped with hard rubber handle metal disc composition. In teaching, the disk itself can not only directly demonstrate the electrostatic induction phenomenon, but also as an auxiliary power demonstration of other static phenomena. However, since the hard rubber used for making the electric disk has poor insulation property, easy to leak electricity and poor electrification effect, its application is greatly restricted even when the weather is dry and the charge generated by each electrification is small. The modern plastics industry produces many new materials that have good insulating properties, are very easy to electrify and generate a large amount of charge. Such as polytetrafluoroethylene (that is, plastic Wang), plexiglass, polystyrene