18WuD2x

kilogram-meter • kite-supported antenna 393
kilogram-meter Abbreviation, kgm. A unit of mechanical
energy (work); 1 kgm is the energy required
to raise a mass of 1 kilogram vertically by
a distance of 1 meter (equal to 7.2334 footpounds).
Also see JOULE.
kilohertz Abbreviation, kHz. A unit of frequency;
1 kHz equals 1000 Hz.
kilohm Symbol, kΩ. A unit of high resistance, reactance,
or impedance; 1 kΩ equals 1000 ohms.
kilojoule Abbreviation, kJ. A unit of energy or
work; 1 kJ equals 1000 joules. See JOULE.
kilolumen Abbreviation, klm. A unit of luminous
flux equal to 1000 lumens. See LUMEN.
kilomega- See GIGA-.
kilomegahertz See GIGAHERTZ.
kilometer Abbreviation, km. A large metric unit of
linear measure; 1 km equals 1000 meters (3280.8
feet).
kilo-oersted Abbreviation, kOe. A unit of magnetic
field strength; 1 kOe equals 1000 oersteds. See
OERSTED.
kiloroentgen Abbreviation, kr. A large unit of radioactive
radiation; 1 kr equals 1000 roentgens.
See ROENTGEN.
kilorutherford Abbreviation, krd. A large unit of radioactivity
equal to 10 9 disintegrations per second.
kilovar A compound term coined from kilo- and
VAR (the abbreviation of volt-amperes reactive). It
is equal to a reactive power of 1000 watts.
kilovar-hour A large unit of reactive electrical energy,
equivalent to 1000 reactive watts manifested
for a period of one hour.
kilovolt Abbreviation, kV. A unit of high voltage;
1 kV equals 1000 V.
kilovolt-ampere Abbreviation, kVA. A unit of high
power that gives the TRUE POWER in a directcurrent
circuit and the APPARENT POWER in an
alternating-current circuit; 1 kVA equals 1000 W.
Also see DC POWER.
kilovolt-ampere reactive See KILOVAR.
kilovoltmeter A voltmeter designed to measure
thousands of volts (kilovolts).
kilowatt Abbreviation, kW. A unit of high power;
1 kW equals 1000 watts. Also see WATT.
kilowatt-hour Abbreviation, kWh. A common unit
of electrical energy; 1 kWh equals 1000 watt
hours, or the equivalent of 1000 watts dissipated
for a period of one hour. Also see ENERGY,
KILOWATT-HOUR, POWER, WATT-HOUR, and
WATT-SECOND.
kilowatt-hour meter A motorized meter for
recording (electrical) power consumption in kilowatt-hours.
Also see KILOWATT-HOUR.
kinematograph A motion picture camera. Also
called CINEMATOGRAPH and KINETOGRAPH.
kine 1. See KINESCOPE, 1. 2. See KINESCOPE
RECORDING.
kinescope 1. The picture tube in a television receiver.
2. See KINESCOPE RECORDING.
kinescope recorder A film or tape apparatus for
recording television pictures.
kinescope recording A motion-picture or videotape
made from the screen (or taken from the circuit)
of a television picture tube.
kinetic energy The energy associated with particles,
bodies, or electric charge carriers in motion.
kinetograph See KINEMATOGRAPH.
kinetoscope A motion-picture projector.
kiosk A computer and peripherals set up for the
purpose of multimedia use by the general public.
It generally uses a touch screen for inputting data
and must be ruggedly constructed to tolerate
rough treatment.
Kirchhoff’s first law The sum of the currents flowing
out of a point in a direct-current circuit
equals the sum of the currents flowing into that
point.
Kirchhoff’s laws (Gustav Robert Kirchhoff, 1824–
1887) Two laws of electric circuits that account
for the behavior of certain networks. See KIRCH-
HOFF’S FIRST LAW and KIRCHHOFF’S SECOND
LAW.
First law: I 1 + I 2 + I 3 = I 4 + I 5
I 4 I 5
x
I 1 I 2 I 3
Second law: V 1 + V 2 + V 3 + V 4 = V 5
V 1 V 2
V 3 V 4
V 5
Kirchhoff’s laws
Kirchhoff’s second law The algebraic sum of all
the voltage drops around a direct-current circuit
(including supply voltages) is always equal to
zero.
kit A selection of components, associated equipment,
supplies (such as wire and hardware), and
instructions for constructing a piece of electronic
equipment.
kite-supported antenna A longwire antenna that
uses a kite as a support for the far (nonstation)
end. A tether is used to reduce the chance that
the kite will fly away with wire attached. It was
used by Marconi in early experiments with radio.
Radio amateurs and shortwave listeners sometimes
use this scheme at low and medium