An apparatus for generating static electricity, consisting of a hard rubber disk that is given a negative charge by friction and a metal plate that is given a net positive charge by induction when in contact with the disk.

• 起电盘产生静电的仪器，由一个硬橡胶圆盘和一个金属板组成，圆盘通过摩擦带负电，金属板在与圆盘接触时感应带正电