Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 207
gnetic Polarity of an Iron King. passed in from any point and flows around each half of the ring in anopposite direction to a diametrically opposite point and thenback to the battery. The arrows indicate the direction of cur-rent and magnetic lines of force, from which it will be seenthat a… … ELECTROMA GNETS. 189 Exp. 61: Connect a horseshoe electromagnet, Fig. 179, with asource of current so that the hmbs are Uke poles. Attract the keeperand then plunge the magnet into iron filings. One pole is producedin the centre of the keeper and the opposite pole in the bend of thehorseshoe. The…
Electricity · Magnetism
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