Question

distinguish between EMF and potential difference

Answer 1

EMF(Electromotive Force)  Potential Difference (PD)EMF, electromotive force, refers to the voltage developed by an electrical source
 Potential difference refers to the observed difference in voltage between any two points in an open circuit. Emf does not depend on the resistance of the circuit. Pd of two points depends on the resistance of those points. Emf is cause. PD is result.