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 383
rush, 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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