The mathematical theory of electricity and magnetism (1911)
Jeans, James Hopwood, Sir, 1877-1946 · Cambridge [Eng.] : University Press · leaf 64
he curves drawn correspond to potentials , , — , and Ct CL 0/ There remains the region between the point D and the equipotential At D the potential is , so that the potential falls as we recede from the a3-04 a equipotential 3-04a and reaches its minimum value at D. The potential at D is of course… … FiG. 22. pendicular to this plane. Taking D as origin, and the plane ABC as planeof xy, it will be found that near D the potential is Thus the equipotential through D is shaped like a right circular cone inthe immediate neighbourhood of the point D. From the equation justfound, it is obvious that…
Electricity · Magnetism
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