This difference in electric potential is represented by the symbol ΔV and is formally referred to as the electric potential difference . By definition, 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. The potential difference between two points in an electric circuit is defined as the work done to Move unit Electric Charge from one Point to another in an electric circuit. Potential Difference vs Electromotive Force (EMF) Many people confuse potential difference with electromotive force (EMF), but they are different: Potential Difference (Voltage): The energy needed to move a charge between two points in a circuit. EMF: The energy supplied by a battery or power source to push the charge through the circuit. Example If a battery provides 9V, it means it supplies 9 Joules of energy to every 1 Coulomb of charge moving through it. This is how voltage works to make ... Electric Potential Difference The electric potential difference between points A and B, V B V A is defined to be the change in potential energy of a charge q moved from A to B, divided by the charge. Units of potential difference are joules per coulomb, given the name volt (V) after Alessandro Volta. (7.3.2) 1 V = 1 J / C
