Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 52
s close the battery key before closing the galvanometer key, to avoid an in-stantaneous deflection of the galvanometer, which may be due to inductancein one of the arms of the bridge. This deflection might occur even thoughthe resistances be properly balanced. If a = b the value of x is the same as… … For example,let and in practice the ratio a :by 100.Again, let a =10 b = 1000 72 = 200;10: 1000:: 200: a;10 a; = 200,000 x = 20,000; = 100, and any reading as R would be multiplied a = 1000 6 = 10 72 = 2001000 : 10 :: 200 : x1000 x = 2000 and the ratio a : b = TJDi and any reading as 72 would be…
Electrical engineering
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