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 71
n, the force at any point,p, distant r from the centre, o, is -f^.—^, and is directed along A 7^ OP. If we take a point, p,very near p in or produced, the force there is ^, and K r- is nearly equal to the force at P. The average electric force along pp is therefore very near to either of these… … 1 Q K ■ rr ,(r-r) JG4> 36] DIFFERENCE OF POTENTIALS 49 Similarly, for the work done between r and p, a point still farthevfiom o at the distance r, we have Q n _ JK V r with precisely similar expressions for each of the very smallsegments into which the line ab, extending from one boundary ofthe…
Electricity · Magnetism
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