Question: An electroscope is a simple device consisting of a metal ball that is attached by a conductor to two thin leaves of metal foil protected

An electroscope is a simple device consisting of a metal ball that is attached by a conductor to two thin leaves of metal foil protected from air disturbances in a jar, as shown. At the point when the ball is contacted by a charged body, the leaves, which regularly hang straight down, spread separated. Why?

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