Electromotive force, or, as it is often written, e.m.f., may be described as that source of energy that enables electrons to move around an electric circuit. Potential difference is the difference in the amount of energy that charge carriers have between two points in a circuit.

Pls I object to the answer becos e.m.f is the work done in taking a unit positive charge round a complete circuit but p.d is from one point to another in circuit. Pls doctor stranger am l wrong