You know that a cetrain electroscope is charged because thefoil extends when the

Question

You know that a cetrain electroscope is charged because thefoil extends when there is nothing near to influence it. when aballoon rubbed with fur is brought near (but not near to change thenet charge on the electroscope), the gold foil is seen to moveslightly downward. Is the change on the electroscope + or -? Pleaseexplain by only using words and not diagrams. Ok, I think the charge is negative, but I don't know how toexplain it more in detail please explain. You know that a cetrain electroscope is charged because thefoil extends when there is nothing near to influence it. when aballoon rubbed with fur is brought near (but not near to change thenet charge on the electroscope), the gold foil is seen to moveslightly downward. Is the change on the electroscope + or -? Pleaseexplain by only using words and not diagrams. Ok, I think the charge is negative, but I don't know how toexplain it more in detail please explain.

Explanation / Answer

Answer can be seen here: /physics-topic-5-444959-cpi0.aspx

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