. A potentiometer can be used to measure
A: emf of newly desined cell
B: internal resistance of a cell
C: unknown resistance
D: potential difference across a resistor
A device which is used to measure.
- the electromotive force (emf) of a cell,
- Potential difference between two terminals,
- the value of resistance,
- And the internal resistance of the cell.
( So, option A , B , C , D is the correct options )