Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 405
insulating rnaterial, may beregarded as a split-tube. The current cannot pass fromone segment to the next without traversing one ofthe fifty-six coils of the armature ; and, as the end ofone coil and the beginning of the next are both con-nected to the same commutator bar, there is a… … Fig, 151. above and below, and so lead away into the circuit thecurrent generated in the coils of the rotating armature.Suppose the lines-of-force in the field to run from rightto left,^ and the armature to rotate left-handedly, as seenin Fig. 151, then, by the rule given in Art. 395, in all 1…
Electricity · Magnetism
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