What is this metal sphere i found in the woods? : r/whatisthisthing
The metal sphere of a small Van de Graaff generator illustrated in the figure below has a radius of 21.7 cm. When the electric field at the surface of the sphere reaches
Hand Crank Van De Graaff Generator, 9.8" Sphere - Up to 100,000 Volts - Includes Assembled Base, Discharge Wand & Grounding Wire - 24" Tall - Eisco Labs: Amazon.com: Industrial & Scientific