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 217
ose R is 5 ohms and AD is 45.5 centimeters;then DB is 54.5 centimeters, and 5 _45.5X 54.5X = 5.99 ohms. Problems A student in using the slide-wire form of Wheatstone bridge (Fig.119) to measure the resistance of several coils records his data as follows : Coil R TO 1 23 4 6.3 ohms. 8.5 20.3 40.8… … Fig. 120. — Box of known resistances. in weighing. Such boxes contain spools of silk-covered wire,each of known resistance, which may be needed in electricalmeasurements. Manganin or some similar alloy, havinga comparatively low conductivity and a small temperature
Electricity · Magnetism
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