دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: voltage induced in the armature of a motor by the magnetic field in which it is turning. Also called counter emf. See electromotive force.

n: (emf) 1. the force that drives electrons and thus produces an electric current. 2. the voltage or electric pressure that causes an electric current to flow along a conductor.3. a difference of potential, or electrical, flow through a circuit against a resistance.

a list of elements arranged according to their standard electrode potentials.

n: a list of elements arranged in order of activity (tendency to lose electrons). The following metals are so arranged: magnesium, beryllium, aluminum. zinc, chromium, iron, cadmium, nickel, tin. copper, silver, and gold. If two metals widely separated in the list (e.g., magnesium and iron) are placed in an electrolyte and connected by a metallic conductor, an electromotive force is produced. See corrosion.

abbr: electromotive force.

electromotive force. The force that drives electrons and creates an electric current.

n: electromotive force that is developed in a conductor by moving the conductor within a magnetic field or moving the magnetic field in relation to the conductor.

n: 1. an instrument to measure electromotive forces by comparison with a known potential difference. 2. a re- sistor used chiefly as a voltage divider.

n: the unit of electric potential, voltage, or electromotive force in the metric system.

n: potential difference or electromotive force, measured in volts.