LC CHOKE-INPUT FILTERThis filter is used in power supplies where voltage regulation is important
and where the output current is relatively high and subject to varying load conditions .
LEADThe opposite of lag. Also a WIRE or CONNECTION .
LEAD-ACID CELLA cell in an ordinary storage battery in which electrodes are grids of lead containing
an active material consisting of certain lead oxides that change in composition during charging and
discharging. The electrodes or plates are immersed in an electrolyte of diluted sulfuric acid .
LEAD INDUCTANCEThe inductance of the lead wires connecting the internal components of an
electron tube .
LEAD SHEATHA continuous jacket of lead molded around a single conductor or multiple conductor
cable. Generally used to ensure conductors are protected from water or extensive moisture .
LEAKAGE CURRENTThe small amount of current that flows through the dielectric between the
conductors of a transmission line .
LEAKAGE FLUXMagnetic flux lines produced by the primary winding that do not link the turns of the
secondary winding .
LEAKAGE RESISTANCEThe electrical resistance that opposes the flow of current through the
dielectric of a capacitor. The higher the leakage resistance, the slower the capacitor discharges or leaks
across the dielectric .
LEAST SIGNIFICANT DIGIT (LSD)The LSD is the digit whose position within a given number
expression has the least weighting power .
LEFT-HAND RULE FOR GENERATORSA rule or procedure used to determine the direction of
current flow in a generator  .
LENZ'S LAWThe current induced in a circuit, caused by its motion in a magnetic field or a change in it's
magnetic flux, in such a direction as to exert a mechanical force opposing the motion or to oppose the
change in flux .
LIGHT-EMITTING DIODE (LED)A PN-junction diode that emits visible light when it is forward
biased. Depending on the material used to make the diode, the light may be red, green, or amber .
LIGHTHOUSE TUBEAn electron tube shaped like a lighthouse that is designed to handle large amounts
of power at uhf frequencies .
LIGHT RAYSLight waves emitting from a source in straight lines .
LIMITERA device that prevents (limits) a waveform from exceeding a specified value .
LINEARHaving an output that varies in direct proportion to the input .
LINEAR IMPEDANCEAn impedance in which a change in current through a device changes in direct
proportion to the voltage applied to the device .
LINE OF FORCEA line in an electric or magnetic field that shows the direction of the force .
LINE OF SIGHTStraight line from a radar antenna to a target .