The Electroscope

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An electroscope is a traditional device for measuring electric charge. Initially, a metallic rod with a negative charge is moved until it touches a metal sphere. The electrons flow though an insulated metallic bar that is distributed between two thin (usually gold) leaves that repel each other. They separate in proportion to the charge.

Contributed by: Enrique Zeleny (March 2011)
Open content licensed under CC BY-NC-SA


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