International Library of Technology · Scranton, International Textbook Co. · leaf 113
ly silk or cotton;otherwise the current would take a shorter and easier cir-cuit from one coil to the adjacent one, or from the first tothe last coil, through the iron core, without circulatingaround the magnet. FORMS OF ELECTROMAGNETS. 2396. The simplest form of an electromagnet is thebar magnet.… … material. The magnetizing coil of fine insulated copperwire w is wound in layers in the bobbin, as shown inFig. 946. The rule for determining the polarity of a solenoid (Art.2390) is the same for an electromagnet. It makes no dif-ference whether the wire is woundin one layer or in any numberof…
Electrical engineering
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