Small, lightweight balls are suspended both on the
outside and inside of a short length of metal tubing.
When the cylinder is charged
(using a Van de Graaff Generator) through the top electrode, the balls touching the
outside surface will be repelled but the balls inside will be unaffected.
device is 26.5 cm.
Recommended for use with our 25470 Adjustable Speed Van
de Graaff Generator.