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 384
of soft iron ismagnetised, and the two actions, of the coil and of the magnet,which are evidently in the same direction, are added together.They are also added when the current is broken. 297. Induction by the Action of the Earth.—If a closedcircuit be displaced or deformed in the magnetic field of… … Fig. 256. 362 ELECTROMAGNETIC INDUCTION [297- induction through the circuit is positive or negative. Thus if acoil, held with its axis in the line of dip, and connected by longwires with a galvanometer, is quickly turned through an angle of180°, the galvanometer needle is deflected. 298.…
Electricity · Magnetism
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