First slide

potentiometer

Question

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

Easy

A

potentiometer is more sensitive than voltmeter
B

the resistance of potentiometer is less than voltmeter
C

potentiometer is cheaper than voltmeter
D

potentiometer does not take current from the circuit

Solution

Potentiometer works on null deflection method. In balance condition, no current flows in secondary circuit.

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