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 54
andT1 with a source of heavy current, plugs are transferred from one box to thecorresponding boles in the other box (this keeps the total resistance in thetwo boxes constant) until no deflection is observed in the galvanometer.This operation is repeated for each of the potential points a, b, c, and… … Fig. 11. Precise Measurement. . Sa — Sb Sc — Sd R. Differential Galvanometer method. — In galvanometers hav-ing two coils wound side by side, when two separate and equal currents aresent through the coils, but in opposite directions, the needle will not move.If the currents are unequal the needle…
Electrical engineering
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