184 



BELL SYSTEM TECHNICAL JOURNAL 



WIRE DIAMETERS =0.0912 CM 

 DISTANCE BETWEEN CENTERS 



0.1825 CM 

 DC CURRENT DENSITY = 1.0 



MAX.= I.82 



LINES OF EQUAL CURRENT 



DENSITY AT 56 KILOCYCLES 



PER SECOND 



LINES OF EQUAL CURRENT 



DENSITY AT 112 KILOCYCLES 



PER SECOND 



D 80 120 160 200 240 280 320 



e IN DEGREES 



Fig. 1 — Current distribution in parallel 19-ga. wires. 



If a wire is carrying a total current, /, distributed unsymmetrically 

 in phase and magnitude as in Figs. 1 and 2, the magnetic field sur- 

 rounding the wire can no longer be the same as would be produced by 

 the same current flowing in the center filament of the wire. The 

 voltage induced in a disturbed filamentary wire located in this field 

 must therefore be different from that induced by the field set up by 

 any of the preceding types of current distribution in the disturbing 

 wire. In each of those cases the induced voltage, e, was exactly in 



