Elementary treatise on electricity and magnetism (1903)
Foster, George Carey, 1835-1919, Joubert, Jules François, 1834-1910. Traité élémentaire d'électricité, Porter, Alfred William, 1863- joint author · London, New York, Longmans, Green, and co. · leaf 411
he experiment may be easily made by means of a disc whichis made to rotate between the poles ofan electromagnet (Fig. 273). The disc,which before the passage of the cur-rent turns easily, offers a considerableresistance as soon as the electromagnetis excited. The effect is greater thegreater the… … Fig. 273. 326] POUCAULT CUERENTS m the two poles, b and a, of an electromagnet by a twisted thread,the cube, if left to itself, spins round rapidly, but it stops themoment the cui-reiit is turned on (Fig. 275). It is clear that .1 pole which can rotate about an axis concentric
Electricity · Magnetism
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