Slide Potentiometer/Carbon Potentiometer/potentiometer
Specifications
An instrument for measuring an unknown voltage by comparison to a standard voltage.An instrument that precisely measures an (emf) or a voltage by opposing to it a known potential drop established by passing a definite current through a of known characteristics. (A three-terminal resistive voltage divider is sometimes also called a potentiometer.) There are two ways of accomplishing this balance: (1) the current I may be held at a fixed value and the resistance R across which the IR drop is opposed to the unknown may be varied; (2) current may be varied across a fixed resistance to achieve the needed IR drop.
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