Elementary treatise on electricity and magnetism : (1905)
Foster, G. C. (George Carey), 1835-1919, Joubert, J. (Jules François), 1834-1910, Porter, Alfred W. (Alfred William), 1863-1939 · London ; New York ; Bombay : Longmans, Green, and Co. · leaf 140
hangs by twococoon fibi-es, 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 tlie needle back to its positionof equilibrium is… … Fig. 6(). 83] QUADRANT ELECTROMETER 117 We may regaid the electioinetei- as consisting of two condensersthe innei coatings of which are portions of the needle at potentialV^, while the outer aie the two pairs of quadrants aa and bb atpotentials V^ and 1., respectively, while their charges are Q^…
Electricity · Magnetism
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