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 222
lancedby moving C or varying the ratio of .t and B until there is no defied ionof the galvanometer. The regular equation of the bridge gives ELECTRIC MEASUREMENTS 193 A_L-xB x when L is the entire length of the loop which is known, and X is thedistance out to the fault. From this we find b —) L.… … Fig. 127. — Connections for Varley loop. decimal ratios of A to B, such as 1 to 10, 100, 1000. In this test thebalance is effected by varying the resistance R. The fundamentalequation for the bridge gives A =L-x B R+x when L is the total resistance of good and bad cables and x is theresistance out…
Electricity · Magnetism
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