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!

Magnetic Field Inside a Toroid

  1. May 13, 2015 #1
    1. The problem statement, all variables and given/known data

    A toroid has a 49.4-cm inner diameter and a 57.4-cm outer diameter. It carries a 23 A current in its 500 coils. Determine the range of values for B inside the toroid.

    A) Bmaximum = ?
    B) Bminimum = ?

    2. Relevant equations

    B = mu0/2pi * NI/r




    3. The attempt at a solution
    I tried plugging in the values from the problem but I am not sure where I am going wrong.

    B minimum = Mu0 * 500 * 23 / 2 pi * (.494/2)

    B maximum = Mu0 * 500 * 23 / 2 pi * (.572/2)

    Am I doing something wrong with the radius? Is the B minimum not thre inner r and the maximum the outer r?
     
  2. jcsd
  3. May 13, 2015 #2

    CWatters

    User Avatar
    Science Advisor
    Homework Helper

    No it's the other way around.

    http://physics.aalto.fi/pub/kurssit/Tfy-3.15xx/Tp_ohjeet/33en.pdf

    If you divide by a smaller number (eg inner radius) you get a larger result (eg maximum B).
     
  4. May 13, 2015 #3
    So the equation becomes

    B maximum = Mu0 * 500 * 23 / 2 pi * (.494/2)

    B minimum = Mu0 * 500 * 23 / 2 pi * (.572/2)

    ?
     
  5. May 14, 2015 #4

    CWatters

    User Avatar
    Science Advisor
    Homework Helper

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Magnetic Field Inside a Toroid
Loading...