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 463
the current shouldbe uniform. By this apparatus current-strengths greater than HIG cannotbe measured. 359. Shape of the Coil.—In many galvanometers, no attempt ismade to calculate the constant Gdirectly; sensitiveness is the onlycharacter looked to. This is greateraccording as the value of tan«… … Fig. 303. 2?radius a is — ; the length of wire being iwa, the field due to unit-length of the wire, or the specific effect, is — , and therefore varies inversely as the square of the radius. We are thus led todiminish as much as possible the radius of the windings and there-fore the length of the…
Electricity · Magnetism
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