electromotive force(redirected from Electromotive force (emf))
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Related to Electromotive force (emf): Electro-motive force
n. Abbr. EMF
The energy per unit charge that is converted reversibly from chemical, mechanical, or other forms of energy into electrical energy in a battery or dynamo.
(General Physics) physics
a. a source of energy that can cause a current to flow in an electrical circuit or device
b. the rate at which energy is drawn from this source when unit current flows through the circuit or device, measured in volts. Abbreviation: emf or EMF Symbol: E Compare potential difference
the energy available for conversion from nonelectric to electric form, or vice versa, per unit of charge passing through the source; the potential difference between the terminals of a source of electrical energy: expressed in volts. Abbr.: emf
1. The force that makes electrons move to produce an electric current. Electromotive force is supplied by a power source, such as a battery or dynamo. It is measured in volts.
2. The difference in the potential energies of a cathode and anode immersed in the same solution of electrolytes or connected in another manner.