What is an electric potential? Give the definition and unit of electric potential.

On bringing some electric charge near any other charge, an attractive or repulsive force exerts on it. Thus, the work is to be done against this force keeping a charge in equilibrium and to move another near or far from it. This work is stored in the form of potential energy. This work done on the charge is called as an electric potential.

The Work required to bring the unit positive charge from infinity to any point against electric force is known as electrical potential at that point.

The SI unit is joule/coulomb or volt (V).