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A metal sphere is insulated electrically and is given a charge. If 25 electrons are added...

A metal sphere is insulated electrically and is given a charge. If 25 electrons are added to the sphere in giving a charge, how many Coulombs are added to the sphere? Please explain. Thanks.
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Answer #1

charge on one electron= 1.6 E-19 C

if 25 electrons are added

charge added=25*1.6 E-19 C =4 E-18 C added

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