The demonstrations use an electronic balance to measure the electric force between two charged balls. The values of the force and the distance fit to a function type F∝db in good agreement with Coulomb's law. This setup also allows demonstrating that the force is proportional to the electrical charge. The electrostatic induction between a charged and a neutral ball can be observed as well.

Topics
Electrostatics, Educational aids, Public policy and governance
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© 1999 American Association of Physics Teachers.
1999
American Association of Physics Teachers
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