Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 351
fact that iron can bemagnetised by a current was discovered by Arago. Sinceiron is magnetised by being brought into a magnetic field anda current flowing in a wire produces such a field it is clearthat the magnetisation will take place. Arago shewed thata spiral of copper wire in which a current is… … Pig. 212. a current be passed through the wire, then the interior of thetube becomes a field of force and a piece of steel placed inthe tube and shaken while there becomes permanently mag-netised. If the tube be filled with a core of soft iron the 342 ELECTRICITY [CH. XXI lines of magnetic force…
Electricity · Magnetism
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