Galvanometer and its resistance. G
Resistance of the shunt of a galvanometer. _s_
Battery and its internal resistance. B
For dynamo machines, the following designations
are proposed:
The machine itself. D
Positive terminal. +T
Negative terminal. -T
Magnet forming the field. FM
Current indicator (amperemeter). AM
Tension indicator (voltameter). MV
Electro-magnet. EM
Luminous intensity of a lamp, in candles. _c.p_.
Resistance of the armature. R_{a}
Resistance of the magnet forming the field. R_{m}
Resistance of the external circuit. R_{o}
Intensity in the armature. C_{a}
Intensity in the coils of the magnet. C_{m}
Intensity in the external circuit. C_{e}
Coefficient of self-induction. L_{s}
Coefficient of mutual induction. L_{m}
A primary battery would be represented as in Fig. 1, and a battery of
accumulators as in Fig. 2.
[Illustration: FIG. 1.]
[Illustration: FIG. 2.]
In order to designate incandescent lamps, circles would be used, and
stars for arc lamps. A system of incandescent lamps arranged in multiple
arc would be represented as in Fig. 3.
[Illustration: FIG. 3.]