Elementary treatise on electricity and magnetism : (1905)
Foster, G. C. (George Carey), 1835-1919, Joubert, J. (Jules François), 1834-1910, Porter, Alfred W. (Alfred William), 1863-1939 · London ; New York ; Bombay : Longmans, Green, and Co. · leaf 471
G^ cos « - T sin aand therefore 2 G^ = -^^ tan a : the square of the current is propoitional to the tangent of thedeflection. ISTo account is here taken of the action of the earths field onthe suspended coil. The effect of this can be eliminated by re-versing the cui-rent in the fixed coil. The… … Fig. 313.coefficient of torsion of the 448 GALVANOMETERS [368 readings gives the appioximate value of the effect due to thecurrent alone, and may be inserted in the above equation. 369. Pellats Absolute Electrodynamometer.—In Pellatsabsolute electrodynamometer (Fig. 314) the movable coil is fixedat…
Electricity · Magnetism
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