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 345
252] MAGNETIC ACTION OF A CURRENT 32] … Fig. 211. the couple due to the earth acts in a plane containing the axis, ithas no effect on the position of the needle. The needle thenalways sets at right angles to the current, whatever be the strengthof the latter. Hence it follows that the actionof the current is exerted in a direction at…
Electricity · Magnetism
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