Kapp Line of Force.
A line of force proposed by Kapp. It is equal to 6,000 C. G. S. lines of
force, and the unit of area is the square inch. Unfortunately it has
been adopted by many manufacturers, but its use should be discouraged,
as it is a departure from the uniform system of units.
One Kapp line per square inch = 930 C. G. S. lines per square
centimeter.
Kathelectrotonus.
A term used in medical electricity or electro-therapeutics to indicate
the increased functional activity induced in a nerve by the proximity of
the kathode of an active circuit which is completed through the nerve.
The converse of anelectrotonus.
Kathode.
The terminal of an electric circuit whence an electrolyzing current
passes from a solution. It is the terminal connected to the zinc plate
of a primary battery.
Kathodic Closure Contraction.
A term in electro-therapeutics; the contractions near where the kathode
of an active circuit is applied to the body, which are observed at the
instant when the circuit is closed.
Kathodic Duration Contraction.
A term in electro-therapeutics; the contraction near where the kathode
of an active circuit is applied to the body for a period of time.
K. C. C.
Abbreviation for Kathodic Closure Contraction, q. v.
K. D. C.
Abbreviation for Kathodic Duration Contraction, q. v.
Keeper.
A bar of soft iron used to connect the opposite poles of a horseshoe
magnet or the opposite poles of two bar magnets placed side by side. It
is designed to prevent loss of magnetism. The armature of a horseshoe
magnet is generally used as its keeper. For bar magnets a keeper is used
for each end, the magnets being laid side by side, with their poles in
opposite direction but not touching, and a keeper laid across at each
end connecting the opposite poles.
Kerr Effect.
The effect of an electrostatic field upon polarized light traversing a
dielectric contained within the field. (See Electrostatic Refraction.)
Kerr's Experiment.
Polarized light reflected from the polished face of a magnet pole has
its plane of polarization rotated; when it is reflected from the north
pole the rotation is from left to right.