N object has a charge of - 2.0 μc. how many electrons must be removed so that the charge becomes + 2.2 μc?

Electrical Charge is a property of matter that causes it to experience a force when place in an electromagnetic field. Charge is measured in coulombs.

The change in the charge is 2.2 - (2.0) = 4.2 μ c.

1 electron has a charge of 1.6 * 10∧-19 coulombs

Therefore, the number of electrons will be;

= (4.2 * 10∧-6) / (1.6 * 10∧-19)

= 2.625 * 10∧13 electrons

Current charge = - 2.0 micro C

Charge needed = + 2.2 micro C

So the net charge is 4.2 micro C

The charge on one electron = - 1.602 x 10^-19 C

Calculating the net change in the number of electrons = 4.2 x 10^-6 / - 1.602 x 10^-19 = - 2.621 x 10^13

The negative sign implies the number of electrons that needs to be removed that is 2.621 x 10^3