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 304
ve, dip into two cups of mercuiT,located one above the other along the axis of the coil. Con-nections are made as indicated, so that the two coils are niseries w^hen connected to an external circuit. The planes ofthe coils should be at right angles to each other. When thecurrent flows through both…
Electricity · Magnetism
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