Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 286
m.f. required to send the current ii throughthe primary coil, which e.m.f. is small in modern transformers andseldom exceeds 1 percent, of e\ even at full-load. The e.m.f. e2 sends a current i2 through the secondary windingin such a direction as to oppose the change of the flux 4> whichproduces… … Fig. 300.—The transformer. 262 PRINCIPLES OF ELECTRICAL ENGINEERING [Chap, xxxiv If now the impedence of the secondary circuit is decreased, thecurrent i2 will increase and thereby reduce the flux </>. But areduction in <f> causes the back e.m.f. en, to decrease and therebyallow a…
Electrical engineering
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