"A"
"B"
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
Previous set of
"I" Terms
INDEX OF REFRACTION. The degree of bending of an RF wave when passing from one medium to
another.
INDIRECTLY HEATED CATHODE. Same as the directly heated cathode with one exception: The hot
filament raises the temperature of the sleeve around the filament; the sleeve then becomes the electron
emitter.
INDUCED-CHANNEL MOSFET. A MOSFET in which there is no actual channel between the source
and the drain. This MOSFET is constructed by making the channel of the same type of material as the
substrate.
INDUCED CHARGE. An electrostatic charge produced on an object by the electric field that surrounds a
nearby object.
INDUCED CURRENT. Current caused by the relative motion between a conductor and a magnetic field.
INDUCED ELECTROMOTIVE FORCE. The electromotive force induced in a conductor because of
the relative motion between the conductor and a magnetic field.
INDUCED VOLTAGE. See INDUCED ELECTROMOTIVE FORCE.
INDUCTANCE. The property of a circuit that tends to oppose a change in the existing current flow. The
symbol for inductance is L.
INDUCTANCE BRIDGE. An ac bridge circuit used to measure an unknown value of inductance.
INDUCTION. The act or process of producing voltage and current by the relative motion of a magnetic
field across a conductor.
INDUCTION FIELD. The electromagnetic field that is produced about an antenna when current and
voltage are present on the same antenna.
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.
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. [Motor Manufacturers]
INDUCTIVE COUPLING. The transfer of energy from one circuit to another by virtue of the mutual inductance
between the circuits. 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.
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.
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).
INFINITE. Extending indefinitely, endless. Boundless, having no limits. An incalculable
number.
INFRALOW FREQUENCY. The band of frequencies from 300 Hz to 3,000 Hz.
INFRARED. The region of the electromagnetic spectrum bounded by the long-wavelength extreme of
the visible spectrum (approximately 0.7 µm) and the shortest microwaves (approximately 0.1 mm).(IR)
INFRASONIC. Sounds below 15 Hz. (SUBSONIC)
Next Set of "I" Definitions and terms
