Difference between cell EMF (Electromotive force) and cell Potential Difference
Difference between cell EMF (Electromotive force) and cell Potential Difference are in tabular form below –
Cell EMF (Electromotive force) |
Cell Potential |
1) Cell EMF is independent of resistance of circuit and depends upon the nature of electrodes and electrolyte. | 1) Cell Potential is dependent upon the resistance between two points of the circuits and current flowing through the circuit. |
2) The term EMF is used only for the source of EMF. | 2) The term Potential is used for difference between any two points or a circuit. |
3) It is greater than the potential between any two points in a circuit. | 3) Cell potential is greater than EMF when the cell is being charged.
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4) It exists even when a circuit is not closed. | 4) It exists only when the circuit is not closed i.e. current flow in the circuit. |
5) It is a cause of cell potential difference (V). | 5) It is the effect of cell E.M.F.
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6) It is used strictly for the source of supply of electricity e.g. cell or a dynamo. | 6) It exists through the circuits, it is measured at any two points in a circuit. |
7) E.M.F occurs due to conversion of chemical energy into electrical energy. | 7) Potential difference occurs due to fall in potential along resistance in a circuit. |
8) The SI unit of EMF is Volt. | 8) The SI unit of cell potential is volt. |
9) Electromotive force of cell is the Maximum voltage in a cell. | 9) Potential is the Less maximum voltage (V<E) |
10) Electromotive force Remains constant | 10) Potential does not remains constant. |
11) It is responsible for the flow of steady current in a cell. | 11) It is not responsible for the flow of steady current in the cells. |