is there back electromotive force also exist in electric motors and generator?.
Answer Hi Adnan, Here’s a quote from Wikipedia: Electromotive force From Wikipedia, the free encyclopedia Jump to: navigation, search Electromotive force (emf) is defined as the amount of energy gained per unit charge that passes through a device in the opposite direction to the electric field produced by that device. It is measured in volts. Sources of electromotive force include electric generators (both alternating current and continuous current types), batteries, and thermocouples (in a heat gradient). [1] Electromotive force is often denoted by or ℰ (script capital E). Electromotive force is measured in volts (in the International System of Units equal in amount to a joule per coulomb of electric charge). Electromotive force in electrostatic units is the statvolt (in the centimeter gram second system of units equal in amount to an erg per electrostatic unit of charge). URL: http://en.wikipedia.org/wiki/Electromotive_force See the references on that page for books and articles on e
