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 382
-■:--■-5 348.—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 … Fie:. 349.—Distortion ofthe Magnetic Field Due tothe Cross-Magnetising Ef-fect of the Armature Cur-rent. One induced pole in each field core tends to strengthen thenumber of lines of force threading from the field to the arma-ture core, wliile the other induced ])ole tends to neutralizethe field…
Electricity · Magnetism
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