problem 1: State the relationship for Coulomb’s inverse square law for the force between two point charges. State the name and unit for each quantity which are used in the relationship.

problem 2: Two electrons are placed 1.5 nm apart. Compute the electrostatic force acting on each electron.

problem 3: The electrostatic repulsive force between two protons in a nucleus is 14 N. Compute the separation between the protons.

problem 4: A point charge of + 2.0 × 10^-8 C is placed a distance of 2.0 mm from a point charge of -4.0 × 10^-8 C.

a) Compute the electrostatic force between the charges.

b) The distance between the same charges is adjusted till the force between the charges is 1.0 × 10^-4 N. Compute this new distance between the charges.

problem 5: Three point charges X, Y and Z each of +20 nC are placed on a straight line as shown below.

Compute the electrostatic force acting on the charge Z.