Answer to Question #234574 in Electricity and Magnetism for miel

Question

A sphere has an excess of 2,88 x 1013 electrons. What is the charge on the sphere?

Answer 1

Since we know that 1 electron has a charge equal to -1.602 X 10^-19 C, we use the conversion factor and find the total charge of the electron excess:

$2.88\times 10^{13}\,{electrons}(\dfrac{-1.602\times10^{-19}\,C}{1\,{electron}}) \implies 2.88\times 10^{13}\,{electrons}=-4.614\times10^{-6}\,C$

In conclusion, 2.88 X 10¹³ electrons (the excess on the sphere) have a charge equal to -4.614 X 10^-6 C.

Reference:

• Sears, F. W., & Zemansky, M. W. (1973). University physics.