The difference between the electrode potentials of two electrodes when no current is drawn through the cell is called:
1. Cell potential.
2. Cell emf.
3. Potential difference.
4. Cell voltage.
Emf |
Potential difference |
| It is the potential difference between two electrodes when no current is flowing in the circuit. | It is the difference of the electrode potentials of the two electrodes when the cell is under operation. |
| It is the maximum voltage that the cell can deliver. | It is always less then the maximum value of voltage which the cell can deliver. |
| It is responsible for the steady flow of current in the cell. | It is not responsible for the steady flow of current in the cell. |
| EMF | Voltage |
| It denotes the voltage produced inside the electric source. | It is the difference potential difference between two points |
| External forces work in moving a charge from one pole to another pole inside a source | It is the work in moving a charge from one pole to another through a wire |
| E = I * (R + r) | V = I * R |
| It follows the coulomb force operation | It follows a non-coulomb force operation |
| It measured with EMF meter | It is measured with a voltmeter |
| It is always greater than the voltage | It is always lesser than EMF |
