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 67
n electric field bounded bytwo concentric spherical con-ducting surfaces. Let p (Fig. 23)be a point in the field at adistance, r, from the commoncentre, o, of the sphericalboundaries. If Q be the chargeon the inner surface, and there-fore - Q the charge on the outersurface, the electric force at p… … Fig. 23. — actine in the 33] FORCE AND POTENTIAL 45 at P must be a quantity such that its rate of decrease is mostrapid in the direction op (or /•), and is equal to -— . —. Putting V for the potential at p, and V for the potential at a point p,distant r from the centre, the change of potential as…
Electricity · Magnetism
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