A potentiometer is an accurate and versatile device to make electrical measurements of , because the method involves:
- ACells
- BPotential gradients
- CA condition of no current flow through the galvanometer
- DA combination of cells, galvanometer and resistances
Solution & Step-by-step Explanation
A potentiometer is considered an ideal voltmeter because at the balance point, it does not draw any current from the cell or circuit whose or potential difference is being measured. This "null method" ensures that the internal resistance of the source does not affect the measurement, making it more accurate than a standard voltmeter.