Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 367
848 PRACTICAL ELECTRICITY. … Fig. 326.—Battery Analogy of Induced E. M. F. in a Ring Armature. of this half of the ring, since these four coils are in series^will therefore be 2 + 4 -[- 4 + 2 or 12 volts, and sincesimilar induction takes place in the other half of the ring atthe same instant, there will be a total of 12 volts…
Electricity · Magnetism
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