Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 340
330 ELECTRICITY [UH. XX 60 that the number of lines of force which traverse it fromsouth to north should be as great as possible, 201. Solenoid. By making the coil in the form of aspiral having a considerable number of turns as in Fig. 198 … instead of the single turn shewn in Fig. 195 its magneticmoment is greatly increased. Each spire of the coil isequivalent to a short magnet of small moment, or more strictlyto a magnetic shell with its axis lying along the axis of thecoil, and this series of magnetic shells constitutes a magnetof…
Electricity · Magnetism
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