Dynamo electric machinery; its design, construction, and operation; direct-current machines (1915)
Sheldon, Samuel, 1862-1920, Hausmann, Erich, 1886- joint author · New York, D. Van Nostrand Company; · leaf 34
f E.M.F. is produced when a conduc-tor cuts one line of force per second. If the conductorcuts two lines in the second, or one line in half a second,then two such units of electromotive force are produced.An E.M.F. of one volt is produced by the cutting of10^ lines of force per second. If, in the… … the negative sign being used because the induced E.M.F.tends to send a current in such a direction as to demag-netize the field. When of no con-sequence the negative sign willhereafter be omitted. If a conductor, Fig. 4, / centi-meters long moves in a directionperpendicular to itself with a…
Electric machinery
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