Question

An object has a charge of-3.8 μC. How many electrons must be removed so that the charge becomes +2.6 μC?

Answer 1

The answer is
`3.994 * 10^(13)\ electrons`

Step-by-step explanation:

The amount of negative charge that must be removed is

`\Delta = Final\ charge - initial\ Charge = 2.6 - (-3.8) = 6.4 \ \mu C = 6.4 * 10^(-6)\ C`

and the charge of one electron is

`1 e = 1.60217662* 10^(-19) \ C`

So the amount of electrons we need to remove is

`x = (6.4 * 10^(-6))/(1.60217662* 10^(-19)) \approx 3.994 * 10^(13)\ electrons`