Question

A sphere has a net charge of -4.8 x 10^-17C. How many excess electrons are there on the sphere?

Answer 1

A sphere has a net charge of

`q=-4.8*10^(-17)\text{ C}`

We have to find the number of excess electrons on the sphere.

By using the quantization of the charge as follows.

`q=ne`

Here, n is the number of excess electrons in the sphere.

And e is the charge of the electron calculated as

`e\text{ = 1.6}*10^(-19)\text{ C}`

Now, the number of the excess electron in the sphere.

`\begin{gathered} n=(q)/(e) \\ n=\frac{-4.8*10^(-17)\text{ C}}{1.6*10^(-19)\text{ C}} \\ n=300 \end{gathered}`

So, there are 300 excess electrons on the sphere.