Elementary treatise on electricity and magnetism : founded on Joubert's "Traité élémentaire d'électricité" (1909)
Foster, G. Carey (George Carey), Porter, Alfred William, 1863-1939, Joubert, Jules François · London : Longmans · leaf 392
268] ENERGY OF A CURRENT 369 The application of the same principles shows that, under theaction of its own flux, a circuit will tend to present the greatestpossible surface; if the contour is flexible, it will take the form … Fig. 224. of a circle, as this comprises the greatest area within a givenperimeter. This is the true explanation of a well-known experiment ofAmpere, which he regarded as proving that two consecutiveelements of the same current repel one another. Two quantities of mercury (Fig. 225), separated by…
Electricity · Magnetism
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