electromotive force
nounUK /ɪˌlɛktrəˈməʊtɪv fɔːs/
US /ɪˌlɛktroʊˈmoʊtɪv fɔːrs/
The push that makes electricity move through a wire.
The battery's electromotive force makes the current flow through the circuit.
OTHER MEANINGS
2. The energy per unit charge that a source such as a battery or generator gives to electric charges.
A 9-volt battery has an electromotive force of about nine volts.
3. The force that drives electric charge around a complete circuit.
Without electromotive force, no current would flow in the loop.
4. A measure of the ability of a device to produce an electric current.
The generator's electromotive force depends on how fast its coil spins.