Experiment Ea-06

Repulsion and Attraction

Description: Two ping-pong balls, coated with silver conducting paint, are suspended by nylon strings to independent supports. The balls may be charged with like charges (with either an ebonite or glass rod) to show repulsion. If they are uncharged and then separated while in the electric field of a charged ebonite or glass rod, they will attract each other.


Two ping-pong balls hanging from a support system.


Left: ebonite rod with cat's fur; Right: glass rod with silk.


Ping-pong balls attracted to each other.


Materials: 2 Ping-Pong balls, conducting paint, nylon strings, two supports, charged rod (ebonite + cat's fur or glass + silk)


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This page was last updated on Wednesday September 3, 2008 10:26 AM