Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 561
is quickly withdrawn, the needle receives amomentai-y impulse in the opposite direction. The magnetization and de-magnetization of the iron core in the induction coil v/ould, therefore, ofitself cause tlie induced currents already described, for these actions areequivalent to suddeu insertion and… … FlG. 271.—A Magnet producing a Current. netized and demagnetized by simply bringing near one end of it the poleof a permanent magnet (see page 484). Upon this principle many ingenious
Inventions
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