Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 73
TMACHINERY 57. Principle of Operation of the Electric Generator.—The simplest type of electric generator is shown diagrammatically inFig. 60. If the conductor ab is moved alternately up and down soas to cut the lines of force that pass from N to S, an e.m.f. willbe generated or induced in the… … Fig. 60.—Generation of electromotive force. when the direction of motion of the conductor is reversed, so thatthe current will flow first in one direction and then in the other;such a current is said to be alternating. 58. Gramme Ring Winding.—The first satisfactory machinethat would give a direct…
Electrical engineering
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