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 85
becavse one enters the surface andthe other leaves it; we shall takeoutward flux—that is to say, thatfor which the normal component isdirected to theoutside—as pos-itive. We havethen, D„dS +n\dS = 0. Allthe surface may Fig. 30. thus be cut into pairs of elements, the fluxes thiough which mutually…
Electricity · Magnetism
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