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 383
ush, due to the self-induction of the coil produced by this current. Each coil isthus short-circuited as it passes underneath each brush, sothat the sparking may become continuous when the dynamois_ running. If the E. M. F. induced in an armature coil of.01 ohm resistance is only .1 volt at the… … 351.—The Act of Commutation of anArmature Coil. At the instant shown coil B is short-circuited bythe brush. * Suppose that the brush in Fig. 351 had been made of copper instead of carbon, as isgenerally used, its resistance would have been less and a greater current would havecirculated around the…
Electricity · Magnetism
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