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 146
tialsbecomes u v,-v Pg It is somewhat difficult to measure accurately the distance eof the two plates. This difiiculty is got rid of by the following device: The lower plate is put toearth so that its potential F=0,and the reading of the micro-meter m, which satisfies the con-dition above stated,… … -V^ •SirPg Fig. 72. SKfrom which by subtraction %-n-Pg e of the two It is thus sufficient to measure the difference epositions of theplate a. 87. In order to keep this plate at a constant potential, Ij, thewhole system consisting of the plate, the guard ring, and the boxis connected with the inner…
Electricity · Magnetism
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