A sphere has a negative charge of 6.4 xx 10^-7 coulombs. Approximately how many electrons must be removed to make the sphere neutral?

2 Answers
Mar 15, 2017

I got 4xx10^12 electrons

Explanation:

You know that one electron has a charge of 1.6xx10^-19C so we need to remove:
(6.4xx10^(-7))/(1.6xx10^(-19))=4xx10^12 electrons

Mar 15, 2017

4*10^12electrons

Explanation:

Since one electron has a charge of 1.6*10^-19C we can simply take the overall charge of the sphere and divide it by the charge of a single electron to see how many electrons account for the overall charge. It would look like

(6.4*10^-4C)/(1.6*10^-19C)

Which would give us 4*10^12electrons