An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 232
he ring servesto carry the flux across from one pole to the other. There are scarcely any lines Fig. 136. — Gramme ring rotating in a Qf force m tne gpace [ns[^emagnetic field. . . the ring. A continuous coilof insulated copper wire is wound on the ring, threadingthrough the hole at every turn.… … 204 ELECTRICITY AND MAGNETISM are moving in such a direction that the induced current tendsto flow toward us. The wires lying on the other side of the ring are moving so as to inducea current away from us.If there were no outsideconnections, these twoopposing e.m.f.s wouldjust balance, and no…
Electricity · Magnetism
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