Neets Master Glossary

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].