Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 360
ee-quarter rev-olution), and fall-ing again to zero atD, and so on. Inan alternating cur-rent dynamo thealternating current wave is not so abrupt as that depicted inFig. 311, but more truly represented by the undulatory curve,Fig. 312, which represents the same variations as before.Thus at the end… … Fig. 312.- -Graphical Representation of an Alter-nating Current. 342 PRACTICAL ELECTRICITY. 322. Magneto Alternator.—The E. M. F. of a dynamodepends upon, (a) The number of lines of force cut by the armature wires, (b) The number of cutting ivires, (c) The speed at which the lines of force are cut.…
Electricity · Magnetism
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