Elementary treatise on electricity and magnetism : founded on Joubert's "Traité élémentaire d'électricité" (1909)
Foster, G. Carey (George Carey), Porter, Alfred William, 1863-1939, Joubert, Jules François · London : Longmans · leaf 501
h 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 n… … Fig. 302. 358] TANGENT GALVANOMETER 479 If the circles are accurately set with their common axis per-pendicular to the magnetic meridian, the field = CG due to thecurrent is at right angles to the earths horizontal field, //, and theresultant field makes with the meridian an angle, a, given by…
Electricity · Magnetism
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