Hi everybody, i have got a question,any help will be much appreciated A ferrite ring core has a slot cut in it such that the plane of the slot contains the axis of the toroid. It is wound with 26 turns. i have attached the picture of the this problem. Relative permeability = 680 Bsat = 0.38T Ignoring leakage and fringing: What is the inductance of the coil? At what current does the ferrite saturate the equation i'm using is N^2/((lair/MoMr*Aair)+(l iron/MoMr*Airon)) l air is 0.0003m Aair = Airon= 1.22518E-3 i calculated this one i'm not sure for liron shoud i use 0.0039*pi and substruct from lair. but still i dont get the right answer. the right answer should be is L=0.000139 H and I=5.5796 A for the current still don't get the answer right. i'm using B/MoMr=H and then H=NI/2Pi*r please.any help will be much appreciated.