A Wimshurst machine is an electrostatic generator that produces high-voltage electricity through mechanical means. It consists of counter-rotating discs, brushes, and a spark gap, which generate electrical discharges when the machine is operated. The 30 cm refers to the diameter of the discs, which determines the machine’s capacity to generate voltage and the length of the sparks it can produce. It's often used in demonstrations of electrical principles and in experiments involving high-voltage phenomena.
