Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 391
238, so that it canrotate about an axis in its own plane. Turn the coil aboutthis axis through 180°. The galvanometer needle is deflected,but returns to zero again; an induced current has passed; 234] ELECTROMAGNETIC INDUCTION 381 continue the rotation through a further 180°; the needle isagain… … Fig. 238. If we call X and Y the two faces of the coil and supposethat in the original position a maximum number of linesof magnetic induction due to the earth enter the coil at theface X and leave it at the face Y, as the coil rotates thenumber of lines entering at X decreases till at last it…
Electricity · Magnetism
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