Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 172
r Current —Magnetic Polarity of a CircularCurrent—The Helix and Solenoid—Testing the Polarity of aSolenoid—Rules for Determining the Polarity of a Solenoid—Graphical Field of a Solenoid—Questions. 166. Electromagnetism.— Exp. 47: Connect three or four chromic acid cells in parallel, closethe… … Battery Fig. 127.—A Current-Carrying Wire Attracting Iron Filings. the filings when the current isflowing, and the attraction willbe equal on all sides of the wire,Fig. 127. When the circuit isbroken the filings drop off of thewire. Electromagnetism, as clistin- Fig. 128.—Graphical Magnetic Field…
Electricity · Magnetism
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