Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 120
of iron ab then, when it is under the N pole as shown, lines offorce pass through it from a to b; half a revolution later the samepiece of iron is under the S pole and the lines of force then passthrough it from b to a so that the magnetism in the iron is re-versed. To continually reverse the… … 96 PRINCIPLES OF ELECTRICAL ENGINEERING [Chap, xvi second, that is with the speed, it also increases with the fluxdensity. 108. Eddy Current Loss.—If the armature A, Fig. 119, weremade of a solid block of iron then, as it rotated, e.m.fs. would beinduced in the surface layers of the iron and eddy…
Electrical engineering
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