Electricity experimentally and practically applied; a book for the beginner and for the practical man, principles, experiments, practical applications and problems (1910)
Ashe, Sydney Whitmore · New York, D. Van Nostrand company · leaf 245
isc, and this current pro-duces a magnetic field. The currentwhich circulates is proportional to theFIG. 287.-Magnets, Type c g. m. f. generated in the disc, since Meter. , ° ^ , ,. . . the resistance of the disc is practi-cally constant. If the temperature of the armature, thefield coils, or the…
Electricity · Electrical engineering
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