Difference Between Potential Difference And Emf

Explanation

(i) emf not depends on current and internal resistance of cell while terminal potential difference depends.
(ii) emf is the potential difference when no current related to cell, while terminal potential difference is the potential difference when some current relates to cell.
(iii) emf is constant for a given cell while terminal potential difference depends on circuit connected to cell. it may different for a given cell.