potentiometer

An instrument for measuring an unknown voltage by comparison to a standard voltage.

A three-terminal resistor with an adjustable center connection, widely used for volume control in radio and television receivers.

An instrument used for measuring the difference of electrical potential between two points.

An instrument for measuring or comparing electrial potentials or electro-motive forces.

a user-adjustable variable resistor that functions as a voltage divider.

an instrument that measures a voltage by opposing it with a precise fraction of a known voltage, and without drawing current from the unknown source.

a measuring instrument for measuring direct current electromotive forces

a resistor with three terminals, the third being an adjustable center terminal; used to adjust voltages in radios and TV sets