Sensibility.
The measure of the effect of a current upon a galvanometer, or any
similar case.
Sensitiveness, Angle of Maximum.
Every galvanometer has its angle of maximum sensitiveness, which is the
angle of deflection at which a small increment of current will produce
the greatest deflection. For every tangent galvanometer 45° is the angle
in question. In using a galvanometer for direct reading methods it is an
object to have it work at its angle of maximum sensitiveness.
Separately Excited Dynamo.
A dynamo-electric machine whose field magnet is excited from an outside
source, which may be another dynamo or a battery. Alternating current
dynamos are often of this description.
Separate Touch.
In magnetism a method of inducing magnetism in a steel bar. The opposite
poles of two magnets are applied at the center of the bar to be
magnetized, but without touching each other, and are drawn apart to its
ends. They are returned through the air and the process is repeated a
number of times and on both sides of the bar if necessary.
Separation of Electricities.
Under the double fluid theory of electricity the action of
electrification in accumulating positive electricity in one conductor
and negative on the other of the excited surfaces of two conductors.
Separator.
India rubber bands or other forms used in batteries to keep the plates
from touching in the cell; especially applied to secondary batteries,
where the plates are so near together as to require separators to
prevent short circuiting.
Fig. 301. SERIES CONNECTION.
Series.
(a) Arranged in succession as opposed to parallel. Thus if a set of
battery jars are arranged with the zinc of one connected to the carbon
of the next one for the entire number, it is said to be arranged in
series. When incandescent lamps are arranged in succession so that the
current goes through one after the other they are arranged in series.
The opposite of parallel, q. v., or multiple arc, q. v.; it may be used
as a noun or as an adjective.
(b) See Electro-Chemical Series;
(c) Thermo-Electric Series
(d) Electrostatic Series;
(e) Electro-motive Series.