Which type of measurement cannot be done by potentiometer?

Question

Question

This question was previously asked in

PGCIL NER DT (Electrical) 27 Feb 2022 Official Paper

Answer 1

A potentiometer does not measure power.

Potentiometer

F1 Jai 10.11.20 Pallavi D2

A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider.
It is used for the measurement of voltage, current, and resistance.
Potentiometers work by varying the position of a sliding contact across a uniform resistance.
In a potentiometer, the entire input voltage is applied across the whole length of the resistor, and the output voltage is the voltage drop between the fixed and sliding contact.