Skip to main content
Select Source:

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.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"electromotive force." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 22 Sep. 2017 <http://www.encyclopedia.com>.

"electromotive force." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (September 22, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/electromotive-force

"electromotive force." The Columbia Encyclopedia, 6th ed.. . Retrieved September 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/electromotive-force

electromotive force

electromotive force (emf) Potential difference between the terminals in a source of electric current, measured in volts. It equals the energy liberated when this voltage drives the current round an electric circuit. See also electricity

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"electromotive force." World Encyclopedia. . Encyclopedia.com. 22 Sep. 2017 <http://www.encyclopedia.com>.

"electromotive force." World Encyclopedia. . Encyclopedia.com. (September 22, 2017). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/electromotive-force

"electromotive force." World Encyclopedia. . Retrieved September 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/electromotive-force