Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 396
citer,since the alternating current cannot be employed to excitethe fields. The exciter may be either a separate dynamo oran independent direct current winding upon the alternatorshaft, Fig. 360, H. (h) Separate Coil, Self-contained Machines, C, Fig360.—Separate coils wound on the armature core are…
Electricity · Magnetism
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