Panasonic Microwave Ovens with Inverters Technical Manual page 41

ELECTRON: A high-speed, negatively-charged particle that revolves around the
nucleus, and forms a part, of all atoms.
ELECTROSTATIC: Pertaining to electricity at rest or to stationary electricity
(static electricity), such as a static charge on an object.
FERRITE: A ferric oxide material that has both magnetic properties and a high
resistance to current flow. The high electrical resistivity makes any current losses
extremely low at high frequencies.
FET: Field-effect transistor.
FILAMENT: A resistance wire or ribbon that, in a magnetron tube, is also the
cathode. When an electric current flows through it, the filament heats up to a
temperature by which electrons are liberated, thus the filament produces free (or
floating) electrons.
FLUX: In electrical or electromagnetic devices, a general term used to designate
collectively all the electric or magnetic lines of force in a given region.
FREQUENCY: The number of times a wave makes one full cycle in one second
of time. Usually expressed in hertz (Hz).
FULL-WAVE RECTIFIER: A circuit that uses both positive and negative
alternations of an alternating current to produce a direct current.
GROUND: Zero potential with respect to the ground or earth. A metallic
connection with the earth is used to establish ground potential, and to provide a
common return to a point of zero potential. When connected to a properly
grounded and polarized circuit, the chassis of a microwave oven is at ground
potential.
HALF-WAVE RECTIFIER: A circuit that uses only ½ of each cycle to change AC
to pulsating DC.
HARMONIC FREQUENCIES: Integral multiples of a primary frequency.
HEATER: See filament.
HEATSINK: A metal device that is clamped onto a heat-sensitive component for
the purpose of diverting and dissipating soldering iron heat.
HENRY: The basic unit of inductance.
HERTZ: Cycles per second.
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