1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Find the inductance and a current of a coil

  1. Sep 27, 2010 #1
    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.

    Attached Files:

  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted