The mathematical theory of electricity and magnetism (1911)
Jeans, James Hopwood, Sir, 1877-1946 · Cambridge [Eng.] : University Press · leaf 47
by placing itin electrical contact with a delicate electroscope bymeans of a conducting wire inserted through the trap-door. It is found that there are no traces of a chargeon the inner sphere. Fig. 10. 47. Suppose we start to find the law of electric force such that there shall be no charge on the… … where the summation extends over all the charges in the field. Let us calculate the potential at a point inside the sphere due to a chargeE spread entirely over the surface of the sphere. If the sphere is of radius a,the area of its surface is 47ra^, so that the amount of charge per unit area…
Electricity · Magnetism
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