Question

difference between voltage and potential difference and emf

Answer 1

EMF, electromotive force, refers to thevoltage developed by an electrical source. Potential difference refers to the observed difference in voltage between any two points in an open circuit. They are not quite the same thing.

Answer 2

❄ $\huge\underline\pink{ E~.~M~.~F.}$ :-

1. It is the potential difference between the two electrodes when to current is being drawn from the cell.
2. It is measured with the help of a potentiometer.
3. It is the maximum voltage that can be drawn from the cell.
4. It is a measure of maximum useful work obtainable from the cell.

❄ $\large\underline\purple{ Potential \: difference }$ :-

1. It is the difference of potentials of two electrodes when current is being drawn from the cell.
2. It is measured with the help of a voltmeter.
3. It is less than E. M. F. of the cell.
4. It gives work which is less than the maximum obtainable work.