Electrostatic Force Quick Check

The electrostatic force between two charges is originally FF. Which expression represents the new electrostatic force between the two charges if one charge doubles and the other one is divided by three?

23F

Which statement describes the relationship between the distance between two charges and the electrostatic force between them?

Electrostatic force is inversely proportional to the square of the distance.

What happens to the electrostatic force between two opposite charges of equal magnitude if the negative charge is replaced with a positive charge and the distance between them is halved?

The direction of the force changes, and the magnitude of the force quadruples.

Two charges q1q1 and q2q2 are both negative. Which statement describes the electrostatic force between the two charges?

The force is represented as a positive quantity and is repulsive.

Suppose the electrostatic force between two electrons is FF. What is the electrostatic force between an electron and a proton that are the same distance apart?

−F