Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 278
.Synchronous Motors A No Load B Fig. 290.—Alternator driving synchronous motors. ing is being cut by lines of force and an e.m.f. is generated in themachine in the same way as if it were driven by an engine. Thise.m.f. Em, called the back e.m.f. of the motor, opposes the appliede.m.f. Eg and is of…
Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-651-413.webp)
