Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 393
gos apparatus. Fig. 239. Acopper disc is made to rotate about a vertical axis and a barmagnet is pivoted above the centre of the disc; the magnetis separated from the disc by a sheet of glass which protectsit from air currents. 234-236] ELECTROMAGNETIC INDUCTION 383 On setting the disc in motion… … Fig. 239. lines of induction due to the magnet and the induced currentscease. If the disc be now stopped, with the magnet still moving,induced currents are again started and these act as a drag onthe magnet, gradually bringing it to rest. In a somewhat different form of the experiment the discis…
Electricity · Magnetism
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