ANALYSIS OF I'lLL AM) MAG.\KT1/ATU)N MKAST ItE.MHNTS 



U7 



-~ OR COIL ABAMPERE TURNS, NI 

 477 ' 



Fig. 11 — Pull curves. 



operated. Hence F' satisfactorily represents the pull ap])lyin<>; in practice 

 through the low density region. In the high density region, the pull falls 

 off as the result of incipient saturation, and the ratio F' /F increases as 

 3^ (or ^ttNI) is increased. 



High Densihj Pull — Core Satiiraiion 



It is convenient to (^xpress the high density p\i\\ in terms of the I'atio 

 F'/F, where F is the actual pull, and /''' the indicated pull conloi'niing to 

 (13) for the same value of J (or 47r.\7). As F'/F is unit}' at low densi- 



