Question

For measurement of potentian difference,potentiometer is preferred in comparison to voltmeter because

Answer 1

While a voltmeter draws a small current from the cell for its operation.So it measures the terminal p.d. in a closed circuit which is less than the emf of a cell.thats why potentiometer is preferred in comparison to voltmeter.

Answer 2

Explanation:

For measurement of potential difference, potentiometer is preferred in comparison to voltmeter because. ... The resistance of the potentiometer is less than voltmeter.