electromotive force

electromotive force, abbr. emf, difference in electric potential, or voltage, between the terminals of a source of electricity, e.g., a battery from which no current is being drawn. When current is drawn, the potential difference drops below the emf value. Electromotive force is usually measured in volts.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

More on electromotive force from Fact Monster:

  • emf - emf: emf: see electromotive force.
  • volt - volt volt [for Alessandro Volta], abbr. V, unit of electric potential and electromotive force. It ...
  • electricity - electricity electricity, class of phenomena arising from the existence of charge. The basic unit of ...
  • potentiometer - potentiometer. potentiometer. 1. Manually adjustable, variable, electrical resistor. It has a ...
  • Lenz's law - Lenz's law Lenz's law, physical law, discovered by the German scientist H. F. E. Lenz in ...

See more Encyclopedia articles on: Electrical Engineering

Play Hangman

Play Poptropica

Play Quizzes

Play Tic Tac Toe