Gerard, Eric Mary, 1856-1916 · New York W.J. Johnston · leaf 56
y small quantity,we can replace LL by L\ and L — L hy I cos /?, /S being theangle made by the axis of the magnet ^A^ with the right linedrawn from 5 to P. Consequently T] _ ^^^ cos (9 _ 3TI cos 0IT D 40 MAGNETISM. 41. Magnetic or Solenoidal Filament.—If we place ele-mentary magnets of equal… … Fig. 10. The potential at a point P, situated at distances L and Lfrom the resultant poles, is ^=»(i-i), which expression is independent of the form of the mag-netic filament, but depends solely on the position of itsextremities. Consequently a magnetic filament forming aclosed chain has a zero…
Electricity · Magnetism
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