Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 483
so to the diagonally oppo-site cup. Suppose that the terminals of a battery are con-nected to AD. and the main circuit to BC: then a currententering at A. with the commutator in the position shown, would follow the courseAabB • • • CcdD. If thecommutator were rockedover, the course would nowbe… … FAEALATS DISC IfACHIXF. 473 the disc was sufficiently rapid, the needle was carried aroundwith the disc, as if there were frietional connection betweenthem. The phenomenon remained unexplained until the dis-covery of electromagnetic induction, when Faradav showedthat the force exerted by the disc…
Physics
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