QS Study

Comparison of emf and potential difference:

  1. The difference of potentials between the two terminals of a cell in an open circuit is called the electromotive force (emf) of a cell. The difference in potentials between any two points in a closed circuit is called potential difference.
  2. The emf is independent of external resistance of the circuit, whereas the potential difference is proportional to the resistance between any two points.
Related Study: