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 181
>and immerse them in a jar con-taining dilute sulphuric acid.Present a bar magnets S-pole ;to the N-face of the turn in thedirection of its axis; the coilwill be attracted, and carryingthe cell with it, move along themagnet till it reaches the mid-dle point, or equator. Thefigure also… … Fig. .143.—Testing the PolaritySingle Turn of Wire. of a The turn is connected to a floating batteryand is free to move. -A coil of wire wound sowithout overlaying itselfis termed a helix, Fig. 144, and may be wound right or left- ELECTR OMA GNETISM. 163 handed. The polarity can be reversed by…
Electricity · Magnetism
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