Two charged particles are placed at a distance 1.0 cm apart. What is the minimum possible magnitude of the electric force acting o each charge?

Two charged particles are separated by a distance 1 cm. What is the minimum possible electric force acting on each charge ?

Two charged particles are a distance 1 mm apart. Find the minimum Coulomb force between them.

Two charged particles are placed at a distance r from each other. The magnitude of the electric force between the two charged particles is F. What will be the effect on F on placing the given charged particles in water? (Take dielectric constant of water 80).

Two charges + 1mu C and +5 mu C are placed 0.1 cm aprt . What is the ratio of the Coulomb force acting on each of the two charges?

Two charges + 2 mu C and + 4 mu C are placed 0.1 cm apart. What is the ratio of the coulomb force acting on each of the two charges.

Two charges are placed a certain distance apart. A metallic sheet is placed between them. What will happen to the force between the charges ?

Two positively charged particles each having charge Q and are d distance apart. A third charge is introduced in midway on the line joining the two charges. Find the nature and magnitude of third charge so that the system is in equilibrium.