The mathematical theory of electricity and magnetism (1911)
Jeans, James Hopwood, Sir, 1877-1946 · Cambridge [Eng.] : University Press · leaf 53
i). If the direction of the lines of force is fromoji to 6)o, then the outward normal intensityFig. 12. Over coa is R.2, so that the contribution from this area to the surface integral is R^o).,. So alsoover (Uj the outward normal intensity is — Ri, so that Wj gives a contribution— R^(Di. Over the… … R^w-i — R\ 03, and since this, as we have seen, must vanish, the theorem is proved. 54-58] Tubes of Force 45 57. Coulombs Law. If R is the outward intensity at a point justoutside a, conductor, then R = 47ro-, where a- is the surface density of electri-fication on the conductor. We have already…
Electricity · Magnetism
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