Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 356
thread through the opposite side, which is equivalent to-a.w,o„ a further diminution of the lines of force through it, the rate ofchange and the E. M. F. decreas-ing until at half revolution theE. M. F. is zero. The direction ofthe E. M. F. is the same through- Fig. 305.—Generation of an E. M. F.by… … out this half revolution, and thecurrent flows around the loopfrom a to c, to d, to b, to a,changing in strength with everyvariation of the generated E. M. F.During the next half revolution thesame variations in E. M. F. occurbut the induced E. M. F. is in theopposite direction. The current is…
Electricity · Magnetism
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