Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 381
Fig. 347.—Magnetic Field Produced by Current Circulating Through the Armature. flowing in the direc-tion indicated, fromthe armature windingsdepicted in Fig. 347,a N and a S-pole areproduced at diametri-cally opposite points,Where the current en-ters and leaves thearmature by thebrushes, just as in… … SV.V Fig. 348.—Reaction of the Armature FieldUpon That of the Field Magnets. ture is placed in its field and current flows from it, Fig. 348,its poles induce two poles in each of the field cores-by mag-netic induction, with the polarities as indicated. ARMATURES. 363
Electricity · Magnetism
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