"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"
LAG. The amount one wave is behind another in time; expressed in electrical degrees.
LAMINATED CORE. A core built up from thin sheets of metal insulated from each other and used in
transformers.
LANDS. Conductors or runs on Printed Circuit Boards [pcb's].
LAP WINDING. An armature winding in which opposite ends of each coil are connected to adjoining
segments of the commutator so that the windings overlap.
LASER. An acronym for light amplification by stimulated emission of radiation.
LAW OF MAGNETISM. Like poles repel; unlike poles attract.
LOGICAL BLOCK ADDRESSING. [LBA] The LBA is the address that the operating system uses to read or write a block of data on the flash drive. A common scheme used for specifying the location of blocks of data stored on computer storage devices.
LC CAPACITOR-INPUT FILTER. This is the most common type of filter. It is used in a power supply
where output current is low and load current is relatively constant.
LC CHOKE-INPUT FILTER. This 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. [Choke Manufacturers]
LEAD. The opposite of lag. Also a WIRE or CONNECTION.
LEAD-ACID CELL. A 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. [Battery Manufacturers]
LEAD INDUCTANCE. The inductance of the lead wires connecting the internal components of an
electron tube.
LEAD SHEATH. A 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 CURRENT. The small amount of current that flows through the dielectric between the
conductors of a transmission line.
LEAKAGE FLUX. Magnetic flux lines produced by the primary winding that do not link the turns of the
secondary winding.
LEAKAGE RESISTANCE. The 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 GENERATORS. A rule or procedure used to determine the direction of
current flow in a generator.
LEG. A current-carrying conductor intended to deliver power to or from a load
normally at an electrical potential other than ground.
LENZ'S LAW. The 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. More LED Terms, [LED Manufacturers]
LIGHTHOUSE TUBE. An electron tube shaped like a lighthouse that is designed to handle large amounts
of power at uhf frequencies.
LIGHT-PIPE. A cylindrical tube or fiber used to pass light from one location to another. [Light Pipe Manufacturers]
LIGHT RAYS. Light waves emitting from a source in straight lines.
Next set of "L" Terms
