The mathematical theory of electricity and magnetism (1911)
Jeans, James Hopwood, Sir, 1877-1946 · Cambridge [Eng.] : University Press · leaf 62
Since 0 is a point of equilibrium the equipotential through the point Cmust of course cut itself at G. At C the potential is 4eCA eCB AB since CA = 2CB. From the loop of this equipotential which surrounds B,the potential must fall continuously to — oo as we approach B, since, by thetheorem of § 51,… … FiG. 20. mediate equipotentials is of special interest, namely that over which thepotential is zero. This is the locus of the point P given by 1 PA PB = 0, and is therefore a sphere. This is represented by the outer of the twoclosed curves which surround B in the figure. In the same way we see that…
Electricity · Magnetism
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