Question

A conducting sphere has a net charge of –6.4 × 10–17

c. What is the approximate number of excess electrons on the sphere?

Answer 1

The charge of a single electron is -1.6 x 10^(-19) C. To figure out the total number of excess electrons, divide the net charge by the charge of a single electron:

-6.4 x 10^(-17) / -1.6 x 10^(-19) = 400

There are about 400 excess electrons on the sphere.

Answer 2

There are 400 electrons on the sphere.

Step-by-step explanation:

Net charge on the sphere = N =
`-6.4* 10^(-17) Coulombs`

Number of electrons = n

Charge on an electron = e =
`-1.602* 10^(-19) Coulombs`

`N=n* e`

`n=(-6.4* 10^(-17) Coulombs)/(-1.602* 10^(-19) Coulombs)`

`n=399.500\approx 400`

There are 400 electrons on the sphere.