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 85
^ this surfaceis equal to the total quantity of electrification within it. 62 GENERAL THEOREMS [42 We may observe, in the first place, that if a charge q is placed•it the point o (Fig. 29), and if a cone of indefinitely small solid angle cZw be supposed to startfrom this point, the fluxwithin this… … oneany Fig. 29. The flux is therefore i;=^JL and 4:17)- ilA = rdo). DflS = qd(o and is independent of the distance r—that is to say, of the positionof the point A. Let us now draw in the field an imaginary, wholly convexsurface (that is to say, a purely geometrical surface, and not thesurface of a…
Electricity · Magnetism
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