Elementary treatise on electricity and magnetism (1903)
Foster, George Carey, 1835-1919, Joubert, Jules François, 1834-1910. Traité élémentaire d'électricité, Porter, Alfred William, 1863- joint author · London, New York, Longmans, Green, and co. · leaf 470
r, SGC^ cos a - r sin «and therefore 1 C^= -^^ tan a: the square of the current is proportional to the tangent of thedeflection. No 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 current in the fixed coil. The… … Fig. 313.coeflScient of torsion of the 448 GALVANOMETERS [368 readings gives the approximate value of the effect due to thecurrent alone, and may be inserted in the above equation. 369. Pellats Absolute Electrodynamometer.—In Pellats absolute electrodynamometer (Fig. 314) the movable coil is…
Electricity · Magnetism
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