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OpenStudy (chris215):
A metal sphere has a charge of -6µC. How many excess electrons are there on the sphere? a. 4x10^-13 b. 10x10^13 c. 4x10^13 d. 10x10^-13
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OpenStudy (anonymous):
So the sphere has a total excess charge of -6µC. The charge of an electron is -1.602E-19 C = -1.602E-13µC. Therefore the number of electrons is: -6µC / -1.602E-13µC ~ 3.75E13 electrons. Rounding up we get answer (c).
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