Question

What is the principle and working of potntiometer ?

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Answer 1

Hey Mate here is your answer....
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Construction and Working Principle. Thepotentiometer consists of a long resistive wire L made up of magnum or with constantan and a battery of known EMF V. This voltage is called as driver cell voltage. ... Let the current through thepotentiometer is I and R is the total resistance of the potentiometer.
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Answer 2

$\huge \mathfrak {Answer:-}$

The $\bold{working}$ of a $\bold{potentiometer}$ is based on the fact that the ​fall of potential across any portion of the wire is directly $\bold{proportional}$ to the length of that portion provided the wire is of $\bold{uniform\:area}$ of cross section and a $\bold{constant\:current}$ is flowing through it.

$\huge \text{Be\:Brainly}$❤️