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 263
llows from the fact that the weightof a piece of steel is not altered by magnetisation. 176. Magnetic Field.—The term magjietic fiehl is convenientlyapplied to any region where a magnet is subject to directive action.Every point of a magnetic field is characteiised by a definitedirection and… … Fig. 155. is proportional to the moment of the couple tending to restore thesmall magnet to its position of equilibrium when its axis is dis-placed therefrom through a given angle. We shall have later (241-243) to consider in detail how thesecharacteristics can be ac-curately determined insome…
Electricity · Magnetism
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