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 187
les of most of our moderncommercial ammeters and voltmeters and is constructedon just the reverse principle of the Thomson type. The in-strument consists essentially of a coil of fine wire pivoted orsuspended in a powerful magnetic field. In the most sensitiveinstruments the coil is suspended by a… … Telescope Fig. 97. — DArsonval galvanometer. N and S, poles of fixed magnet. nometer which is convenient for use in the laboratory. A softiron core is supported rigidly between the poles in order toconcentrate the magnetic lines of force. The rotation of themoving coil of such a sensitive…
Electricity · Magnetism
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