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INDUCED CHARGE—An electrostatic charge produced on an object by the electric field that surrounds a
nearby object [1].
INDUCED CURRENT—Current caused by the relative motion between a conductor and a magnetic field
[1].
INDUCED ELECTROMOTIVE FORCE—The electromotive force induced in a conductor because of
the relative motion between the conductor and a magnetic field [1].
INDUCED VOLTAGE—See INDUCED ELECTROMOTIVE FORCE [1].
INDUCTANCE—The property of a circuit that tends to oppose a change in the existing current flow. The
symbol for inductance is L [2] [7].
INDUCTANCE BRIDGE—An ac bridge circuit used to measure an unknown value of inductance [16].
INDUCTION—The act or process of producing voltage and current by the relative motion of a magnetic
field across a conductor [1].
INDUCTION FIELD—The electromagnetic field that is produced about an antenna when current and
voltage are present on the same antenna [10].
INDUCTION LOSSES—The losses that occur when the electromagnetic field around a conductor cuts
through nearby metallic objects and induces a current into that object [10].
INDUCTION MOTOR—A simple, rugged, ac motor with desirable characteristics. The rotor is energized
by transformer action (induction) from the stator. Induction motors are used more than any other type
[5].
INDUCTIVE COUPLING—Coupling of two coils by means of magnetic lines of force. In transformers,
coupling applied through magnetic lines of force between the primary and secondary windings [2].
INDUCTIVE REACTANCE—The opposition to the flow of an alternating current caused by the
inductance of a circuit, expressed in ohms. Identified by the symbol X
L
[2] [9].
INERTIA—The physical tendency of a body in motion to remain in motion and a body at rest to remain at
rest unless acted upon by an outside force (Newton's First Law of Motion) [15].
INFINITE—(1) Extending indefinitely, endless. (2) Boundless, having no limits. (3) An incalculable
number [1].
INFRALOW FREQUENCY—The band of frequencies from 300 Hz to 3,000 Hz [19].
INFRASONIC (SUBSONIC)—Sounds below 15 Hz [10].
IN PHASE—Applied to the condition that exists when two waves of the same frequency pass through their
maximum and minimum values of like polarity at the same instant [2].
INPUT—The current, voltage, power, or driving force applied to a circuit or device [13].
INPUT END—The end of a two-wire transmission line that is connected to a source [10].
INPUT IMPEDANCE—Impedance presented to the transmitter by the transmission line and its load [10].
INPUT/OUTPUT—Pertaining to either input or output or both, especially in data processors [13].
