PotentiometerPotentiometer, pronounced puh tehn shee AHM uh tuhr, is a device that measures electric current, voltage, and resistance with high precision. It shows voltage differences by comparing an unknown electromotive force with a known one. It is used to calibrate voltmeters or ammeters, and as a control element in electronic circuits and devices. See also Ammeter; Voltmeter.Contributor: Robert B. Prigo, Ph.D., Prof. of Physics, Middlebury College. Master Index
World Book and the globe device are trademarks of World Book, Inc. |