Lenz's Law

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“Experiment illustrating Lenz’s Law. If a copper ring be held in front of an ordinary elecromagnet, and the current circulating through the coil of the magnet be in such a direction as to magnetize the core as indicated b the letters S N, then as the current increases in the coil more and more of the lines of force proceeeding from N pass through the ring OO from left to right.” -Hawkins, 1917




Hawkins and Staff Hawkins Electrical Guide Number One (New York: Theo. Audel and Company, 1917) 132


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