Question

For measurement of potential difference, potentiometer is perferred in comparison to voltmeter because
A. Petentiometer is more sinsitvie than voltmeter
B. The resistance of potentiometer is less than voltmeter
C. Potentiometer is cheaper than voltmeter
D. Potentiometer does not take current form the circuit

Answer 1

Correct Answer - D
(d) Potentiometer works on null deflection method. In balance. Condition no current flows in secondary circuit.