Physics Dept. Demonstration Manual

DEM03 - Electrostatic Point Discharge, "Electric Whirl"

Objective: To illustrate discharge from a point.  
  • Wimshurst machine
  • Propeller
  • Leads


One lead from the Wimshurst machine is connected to the pivot of the propeller. Another lead is connected to the metal cart. Rapid rotation is caused by reaction forces due to the repulsion of electrons from the points.