A piece of cotton and a piece of synthetic rubber are rubbed together, and the cotton is touched against a neutral pith ball. Next, in a separate experiment, silk and ebonite are rubbed together. The rubbed piece of silk is brought near the top of a metal wand electroscope and the electroscope is charged permanently by induction. When the pith ball is brought near the bulb of the electroscope, what type of behavior would it show? Explain your answer.

College Physics
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ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
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Chapter19: Electric Potential And Electric Field
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Problem 7PE: Integrated Concepts A lightning bolt strikes a tree, moving 20.0 C of charge through a potential...
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A piece of cotton and a piece of synthetic rubber are rubbed together, and the cotton is touched against a neutral pith
ball. Next, in a separate experiment, silk and ebonite are rubbed together. The rubbed piece of silk is brought near the top
of a metal wand electroscope and the electroscope is charged permanently by induction. When the pith ball is brought
near the bulb of the electroscope, what type of behavior would it show? Explain your answer.

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