schoolscienceproject.blogspot.in
Electrical ball game
Fix a piece of
silver paper cut into the shape of a footballer on to the edge of a phonograph
record, rub the record vigorously with a woollen cloth and place it on a dry
glass. Put a tin can about two inches in front of the figure. If you hold a
small silver-paper ball on a thread between them, it swings repeatedly from the
figure to the can and back. The electric charge on the record flows into the
silver-paper figure and attracts the ball, it becomes charged, but is
immediately repelled because the charges become equal, and goes to the can, where
it loses its electricity. This process is repeated for a time.
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