Harmsworth, Alfred Charles William, Sir, bart · London Bombay : Longmans, Green, and Co. · leaf 325
MOTORS AND MOTOR-DRIVING (whether the pole of a permanent magnet or of an electro-magnet does not matter) and if the current passes along the wirew so as to produce a south pole near the top of c slightlybelow N, and if the coil and core be capable of upward move-ment only, there will be a tendency… … Fig. I MAIN CIRCUIT Fig. 2 arrow, an electro-magnet will be produced with powerful poles,capable of strong attraction as at N and S. It will be under-stood that the windings are of course merely diagrammatic,many more turns of wire being used in actual practice. If a soft iron ring, c, fig. 3, have…
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