Dynamos and motors; a text book for colleges and technical schools (1911)
Franklin, William S. (William Suddards), 1863-1930, Esty, William, 1868-1928 · New York The Macmillan company · leaf 101
ow thepositive and negative sets of the electromotive-force values areunlike when the north poles of the magnet are not similar inshape to the south poles. It is important to note in connection with Figs. 69, 70 and 71 go DYNAMOS AND MOTORS. that a certain armature wire must be chosen as an index… … Fig. 71. at that instant. Thus, the wire a is chosen as the index pointin Fig. 70, and wherever this wire may be at a given instant theordinate of the electromotive-force curve which is immediatelybeneath a represents the electromotive force at that instant. Exavtples of current curves. — When an…
Dynamos · Electric motors
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