Elementary treatise on electricity and magnetism : (1905)
Foster, G. C. (George Carey), 1835-1919, Joubert, J. (Jules François), 1834-1910, Porter, Alfred W. (Alfred William), 1863-1939 · London ; New York ; Bombay : Longmans, Green, and Co. · leaf 357
nclosed±t = . If the radius of the circle of integration is greater than that ofthe wire the whole current is enclosed ; if this current is 6, thefield at external points is therefore a If a is less than the radius (r) of the wire, only part of the currentis enclosed. Assuming the current to be… … Fig. 221. 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 weregaid this system as sensibly consisting of a series of circularcurrents whose centres are all on thesame cii-cular axis (which is equivalentto neglecting the component…
Electricity · Magnetism
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