Elementary treatise on electricity and magnetism (1903)
Foster, George Carey, 1835-1919, Joubert, Jules François, 1834-1910. Traité élémentaire d'électricité, Porter, Alfred William, 1863- joint author · London, New York, Longmans, Green, and co. · leaf 356
nt enclosed XI = . a If the radius of the circle of integration is greater than that ofthe wire the whole current is enclosed ; if this current is C, thefield at external points is therefore a If a is less than the radius {r) of the wire, only part of the current is enclosed. Assuming the current… … 266] ANCHOR RING COIL 333 Again, take the case shown in Fig. 221 in which a coil iswound in a close spiral on the surface of an anchor ring. If weregard this system as sensibly consisting of a series of circularcurrents whose centres are all on thesame circular axis (which is equivalentto…
Electricity · Magnetism
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