What are the advantages of a potentiometer?

Potentiometer works on the method of zero deflection so that the possibility of error is extremely small. It is a highly sensitive device, therefore it can measure small EMFs.

A standard cell can be used to standardize a potentiometer.
As per the requirement, the length of the potentiometer can be increased in order to get an accurate value.
The potentiometer does not draw any current from the circuit in which it is used.

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