Elementary treatise on electricity and magnetism : (1905)
Foster, G. C. (George Carey), 1835-1919, Joubert, J. (Jules François), 1834-1910, Porter, Alfred W. (Alfred William), 1863-1939 · London ; New York ; Bombay : Longmans, Green, and Co. · leaf 370
wire, the needle is found to be stronglymagnetised, and there are as many reversals of polarity, or conse-quent jwles, as there are reversals of the current. These poles arealternately of opposite signs. Those of the ends are of the samekind, or of opposite kinds, according as the number of…
Electricity · Magnetism
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