Practical electricity, with questions and answers (1901)
Cleveland armature works, [from old catalog] comp, Lincoln, John C. [from old catalog] · [Cleveland, Ohio, Cleveland armature works] · leaf 232
ve been direct; that is, constantly flowing inone direction. An alternating current is one which changesits direction manj^ times every second; that is, the currentflows first in one direction and then in the opposite, thetime required for alternation or reversal varying from 1-50to 1-275 of a… … Figure 78Two successive alternations or one cycle. Fig. 78 is the diagram of two successive alternations ina circuit. Two successive alternations, such as shown inthis figure, are called a period or a cycle. A two-pole ma-chine will produce one cycle every revolution. Fig. 79 220 shows a bi-polar…
Electricity · Electric generators
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