To divide, subtract (algebraically) the exponent of the divisor from
that of the dividend for the exponent of the new factor, and divide the
characteristics one by the other for the new characteristic. Algebraic
subtraction is effected by changing the sign of the subtrahend,
subtracting the numerically smaller number from the larger, and giving
the result the sign of the larger number.
(Thus to subtract 7 from 5 proceed thus; 5 - 7 = -2.)
Thus;
(25 X 10^6) / (5 X 10^8) = 5 X 10^-2
(28 X 10^-8) / (5 X 10^3) = 5.6 X 10^-11
[Transcriber's note: I have replaced ordinary exponential notation by
the more compact and simpler "programming" representation. The last two
example would be:
25E6 / 5E8 = 5E-2
28E-8 / 5E3 = 5.6E-11
]
Tension.
Electro-motive force or potential difference in a current system is
often thus termed. It is to be distinguished from intensity or current
strength, which word it too greatly resembles.
Tension, Electric.
(a) The condition an electrified body is brought into by
electrification, when each molecule repels its neighbor. The condition
is described as one of self-repulsion.
(b) The voltage or potential difference of a circuit is also thus
termed.
Terminal.
The end of any open electric circuit, or of any electric apparatus; as
the terminals of a circuit, dynamo, or battery.
Terminal Pole.
In telegraph line construction the last pole of a series; one beyond
which the line is not carried. Such pole, as the pull of the wires is
all in one direction, requires special staying or support. The regular
line poles are free from this strain, as the wire pulls in both
directions.
Tetanus, Acoustic.
A term in electro-therapeutics. An effect produced on a nerve by very
rapidly alternating induced currents. The currents are produced by an
induction coil with a vibrator giving a musical note. This is a species
of gauge of proper frequency of alternations.
Theatrophone.
An apparatus worked by automatic paying machinery by which a telephone
connection is made with a theatre or opera by the deposition of a coin
in a slot.
Therm.
A unit of heat. It has been proposed by the British Association and
amounts to a redefinition of the smaller calorie. It is the amount of
heat required to raise the temperature of one gram of water one degree
centigrade, starting at the temperature of maximum density of water.