The difference between electromotive force (emf) and the potential difference (pd) are as follows:
SN | Electromotive Force (emf) | Potential Difference (pd) |
1. | The emf is the difference of potential between two electrodes of a cell in an open circuit. | Potential difference is the difference between any two points in a closed circuit. |
2. | It is greater than the potential difference during charging. | It is greater than emf during charging, |
3. | It is the cause of the potential difference. | It is an effort to make the electromotive force |
5. | It depends upon the internal resistance of the cell. | It depends upon the external resistance of the circuit. |