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 461
with two circles, each of 25 centimetres radius, the magnetic fieldis almost exactly uniform for a distance of 2-5 centimetres on eachside of the middle point. Fig. 302 represents a galvanometer constructed upon thisprinciple, which is due to Helmholtz. With an instrument of thiskind, having in all… … Fig. 302. ^, 2irw(2 n (a^ + x^yk a 358] TANGENT GALVANOMETER 439 If the circles are accurately set with their common axis per-pendicular to the magnetic meridian, the field = CG due to thecurrent is at light angles to the earths horizontal field, H, and theresultant field makes with the meridian an…
Electricity · Magnetism
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