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 317
ternating current produced. It will also beseen that if the coil terminals are open or disconnected verylittle energy will be required to move the magnet, since therewill now be no attractions and repulsions to overcome. The extra energy required when the coil is closed is ex-pended in producing… … Fig 265.—The Polarity of the Induced Cur-rent Tends to Stop the MotionProducing It.—Lenzs Law. F. will be constant, and,since the resistance of thecoil is constant, the cur-rent will also be constant.Suppose a galvanometerof much lower resistanceis connected to the coil,Fig. 264. The currentwill…
Electricity · Magnetism
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