The mathematical theory of electricity and magnetism (1911)
Jeans, James Hopwood, Sir, 1877-1946 · Cambridge [Eng.] : University Press · leaf 116
may be regarded as forming a parallelplate condenser. If, however, the potential of the two quadrants joined to E is differentfrom that of the two quadrants joined to F, there is an electrical forcetending to drag the needle under that pair of quadrants of which the potentialis more nearly equal to… … Fig. 41. 108 Systnm of CoiulKctors [ch. iv indication of the difference of potential between the two pairs of quadrants.This angle is most easily observed by attaching a small mirror to the fibrejust above the point at which it emerges from the quadrants. Let us suppose that when the needle has…
Electricity · Magnetism
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