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 139
. The needle usually hangs by twococoon fibres, which constitute what iscalled a hifilar suspension. The position of mechanical equili-brium of the needle is that in which thetwo fibres are in the same plane. Fora small deflection the force which tendsto bring the needle back to its positionof… … Fig. 66. 83] QUADEANT ELECTROMETER 117 We may regard the electrometer as consisting of two condensersthe inner coatings of which are portions of the needle at potentialV„ while the outer are the two pairs of quadrants aa and bb atpotentials V^ and F^ respectively, while their charges are Qj andQ2;…
Electricity · Magnetism
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