Coulomb S Law

To find the number of excess electrons, we use the formula:
where:
- is the charge on the body,
- is the charge of one electron.

Substituting the values:
Thus, the number of excess electrons is

According to Coulomb's law, the electrostatic force between two point charges is:
where:
is Coulomb’s constant,
and are the magnitudes of the charges,
is the distance between them.

The forces on charges A and B due to each other are equal in magnitude but opposite in direction. This is a direct consequence of Newton’s Third Law, which states that every action has an equal and opposite reaction.