When a neutral electroscope is touched with a negatively charged rod, the charge on the electroscope is negative.
A scientific tool called an electroscope is employed to find the existence of an electric charge on a body. The first electroscope with a pivoting needle was created in 1600 by British physician William Gilbert and was named a versorium.
An electroscope is a tool that can be used to determine whether or not a given object is electrically charged. Two metallic (aluminum) foils or strips are positioned very closely together to form an electroscope. Similar charges applied to both strips cause them to reject one another and widen.
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