Electric potential can be stated as potential energy per unit charge, just as electric field is defined as force per unit charge. The concept of electric potential can be derived from work done in electric systems. If a test charge q is introduced in the space where an electric field exists, it will experience an electric force. Work is done if the test charge is moved from one point to another in the presence of electric field. The electric potential at a point is defined as the amount of work required to bring a unit positive charge from infinity to the point under consideration.
Electric potential is a scalar quantity.
The unit of potential is called volt. The principle of superposition applies to the electric potential. When more than one charge is present, the electric potential at a point is the algebraic sum of the potentials due to each of the charges present. V N are the potentials due to N different charges and, ri is the distance of the charge q i in general. The result is the same whether the total charge q is uniformly distributed or placed at the center.