1-22
ELECTRICAL POWER SYSTEM—Provides the necessary input power [18].
ELECTRICAL SYMBOLS—Graphic symbols used to illustrate the various electrical or electronic
components of a circuit [4].
ELECTRICAL ZERO—A standard synchro position, with a definite set of stator voltages, that is used as
the reference point for alignment of all synchro units [15].
ELECTRODE—The terminal at which electricity passes from one medium into another, such as in an
electrical cell where the current leaves or returns to the electrolyte [1].
ELECTRODYNAMIC METER MOVEMENT—A meter movement using fixed field coils and a moving
coil; usually used in ammeters and wattmeters [3].
ELECTRODYNAMOMETER—A meter using an electrodynamic movement to measure an electric
current [16].
ELECTROLYSIS—The process of changing the chemical composition of a material by passing an electric
current through it [4] [11].
ELECTROLYTE—A solution of a substance that is capable of conducting electricity. An electrolyte may
be in the form of either a liquid or a paste [1].
ELECTROMAGNET—An electrically excited magnet capable of exerting mechanical force or of
performing mechanical work [1].
ELECTROMAGNETIC—The term describing the relationship between electricity and magnetism. A
quality that combines both magnetic and electric properties [1].
ELECTROMAGNETIC FIELD—The combination of an electric (E) field and a magnetic (H) field [10].
ELECTROMAGNETIC INDUCTION—The production of a voltage in a coil because of a change in the
number of magnetic lines of force (flux linkages) passing through the coil [1] [2].
ELECTROMAGNETIC INTERFERENCE—Man-made or natural interference that degrades the quality
of reception of radio waves [10] [17].
ELECTROMAGNETIC RADIATION—The radiation of radio waves into space [10].
ELECTROMAGNETISM—The generation of a magnetic field around a current-carrying conductor [2]
[3].
ELECTROMOTIVE FORCE (emf)—The force (voltage) that produces an electric current in a circuit [2].
ELECTRON—The elementary negative charge that revolves around the nucleus of an atom [1].
ELECTRON GUN—An electrode of a CRT that is equivalent to the cathode and control grid of
conventional tubes. The electron gun produces a highly concentrated stream of electrons [6].
ELECTRON ORBITAL MOVEMENT—The movement of an electron around the nucleus of an atom
[11].
ELECTRON SHELL—A group of electrons which have a common energy level that forms part of the
outer structure (shell) of an atom [1].
