Practical electricity .. with questions and answers (1911)
Cleveland armature works, [from old catalog] comp, Lincoln, John C. [from old catalog] · [Cleveland, Ohio, Cleveland armature works] · leaf 61
somesuch means are necessary. Fig. 25 shows the same machine as Fig. 24, except thatthe armature is driven in the opposite direction by me-chanical power. We have the north pole at the top andthe current tending to flow through the wire in the samedirection as in Fig. 24. There will be a drag on… … Figure 25 Motion of a wire i*i a magnetic field and theresulting current. Since there is the same mechanical drag in each wirein the upper air gap and an equal mechanical drag in theopposite direction in each wire in the lower air gap, it re-quires a mechanical torque or twisting effort on the…
Electricity
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