back electromotive force
- The voltage developed in an inductive circuit through which AC flows. The polarity of this voltage is at all times the opposite of that of the applied voltage. Its abbreviation is back emf. Also known as back voltage, counter emf, or reverse voltage (1).
- synonymback emf
- synonymback voltage
Cars & Driving
- noun voltage which opposes the current when the current in an inductive circuit changes and the magnetic field cuts the conductors