Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 27
of electricity passedthrough the coil from a battery or dynamo, as in Fig. 10, thesteel will be permanently magnetised with a N and S-pole,after the current is turned off. Tapping the end of the steelwith a hammer, while it is under the influence of the current,will produce better results. Instead… … v \ f Fig. 10.—Magnetisation by an Electric Current. be obtained.. In making a horseshoe magnet by thismethod insert one limb all the way in the spool; turn on thecurrent ; tap it; turn off the current; remove this limb, andinsert the other limb in the opposite end of the coil andrepeat the…
Electricity · Magnetism
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