Elementary treatise on electricity and magnetism : founded on Joubert's "Traité élémentaire d'électricité" (1909)
Foster, G. Carey (George Carey), Porter, Alfred William, 1863-1939, Joubert, Jules François · London : Longmans · leaf 418
soft iron ismagnetised, and the two actions, of the coil and of the magnet,which are evidently in the same direction, are added togethei*.They are also added when the current is broken. 297. Induction by the Action of the Earth.—If a closed circuit be displaced or deformed in the magnetic field of… … Fig. 256. 396 ELECTROMAGNETIC INDUCTION [297- induction through tlie circuit is positive or negative. Thus if a coil,held with its axis in the line of dip, and connected by long wires witha galvanometer, is quickly turned through an angle of 180° about aline perpendicular to the axis, the…
Electricity · Magnetism
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