Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 1058
permanent magnets, or extraneous means ofexcitement, were employed. It is now used without limitation for electricgenerators or motors. Dynamo machines are called dynamo-electric generators when theyconvert mechanical into electric energy, and dynamo-electric motors whenthey are arranged to produce… … Fig. 1004 a magnetic field may be rectified. But though the current is thus renderedunidirectional, it is of very varying strength, changing from zero to amaximum, and again to zero, twice over in each revolution. By the applica-tion of a principle discovered by Pacinotti in 1862, and subsequently…
Physics
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