Ohmic Resistance.
True resistance as distinguished from spurious resistance, or
counter-electro-motive force.
Ohm, Legal.
The practical unit of resistance. The resistance of a column of mercury
one square millimeter in cross-sectional area and 106 centimetres long
at 0º C. (32º F.) The ohm used previously to 1884 is the B. A. Unit of
Resistance, q. v.
One legal ohm = 1.0112 B. A. Units, and I B. A. Unit = 0.9889 legal ohm.
The resistance of a copper wire 1 foot long and 1/1000 inch in diameter
is about 10 ohms. The resistance of 1 mile of iron wire 1/3 inch in
diameter is about 10 ohms.
Synonym--Congress Ohm.