The mathematical theory of electricity and magnetism (1911)
Jeans, James Hopwood, Sir, 1877-1946 · Cambridge [Eng.] : University Press · leaf 44
Fig. 8. occur will contribute —e^dw and -^^ e^dw respectively, the fourth and fifth ifthey occur will contribute — eidoa and -\-e^da) respectively, and so on. Thetotal contribution from the cone surrounding dco is, in every case, + e^doi. … Fig. 9. Summing over all cones which can be drawn in this way through 7? we obtain the whole value of 1 iN^dS, which is thus seen to be simply e^ multiplied by the total surface area of the unit sphere round i?, and therefore 47re,. 3—2 36 Electrostatics-—Field of Force [ch. ii On the other hand if…
Electricity · Magnetism
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