Calculate the electric potential energy due to the electri repulsion between two nuclei of `^12 C` when they touch each other at the surface.

Calculate the height of potential barrier for a head on collision of two deuterons. The effective radius of deuteron can be taken to be 2fm. Note that height of potential barrier is given by the Coulomb repulsion between two deuterons when they just touch eachother.

Calculate the distance between two protons such that the electrical repulsive force between them is equal to the weight of either.

Electric potential energy V between two charges varies with distance (r) between them as

What is the force of repulsion between two charges of 1C each, kept 1m apart in vacumm ?

Two objects repel each other. This repulsion could be due to

Assertion : When two positive point charges move away from each other, then their electrostatic potential energy decreases. Reason : Change in potential energy between two points is equal to the work done by electrostatic forces.