The mathematical theory of electricity and magnetism (1911)
Jeans, James Hopwood, Sir, 1877-1946 · Cambridge [Eng.] : University Press · leaf 67
axis with centre N and radius QN. This circle subtendsat i? a solid angle 27r (1 - cos (9i), 58 Electrostatics—Field of Force [CH. n where ^i is the angle QPiN. Thus the surface integral of normal forcearising from gj, taken over the circle QN, is 27rei (1 — cos Q-^ and the total surface integral… … Fig. 23. of QQ. This contains no electric charge, so that the surface integral ofnormal force taken over it must be nil. Hence the integral of force overthe circle QN must be the same as that over the similar circle drawnthrough Q. This gives the equations of the lines of force in the form…
Electricity · Magnetism
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