The electric potential difference is the difference in electric potential (V) between the final and the initial location when work is done upon a charge to change its potential energy. It is symbolized as ΔV.
ΔV = Vₓ - Vₐ
where,
ΔV = potential difference between point x and a
Vₓ = potential at position x
Vₐ = potential at position a
ΔV =
For example, every battery has two terminals, and its voltage is the potential difference between them.
In simple terms, the potential difference (which is the same as voltage) is equal to the amount of current multiplied by the resistance.
V = I X R
A potential difference of one Volt is equal to one Joule of energy being used by one Coulomb of charge when it flows between two points in a circuit.