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BELL SYSTEM TECHNICAL JOURNAL 



reduce the loss at another frequency, contrary to well established ex- 

 periments at considerably higher fields, for which the hysteresis loss 

 at one frequency may be reduced by superposing a magnetizing force 

 at a different frequency. The inductance is the same to both funda- 



< 0.07 



1 2_3 4 5 6 7 



1 IN MILLIAMPERES 



Fig. 10a — Hystcretic inductance to one current in the presence of another. 



mentals in all cases except the second, for which a small difference 

 exists. The effect of a superposed alternating current is always 

 apparent through an increased inductance, although sometimes the 

 increase may be slight; it is determined by the larger current. 



