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Homework Help: Ampere's law

  1. Mar 25, 2008 #1
    Use ampere's law to determine the magnetic field (a) inside and (b) outside a toroid, which is like a solenoid bent into the shape of a circle.

    Here is my work..


    a.) B(2PIr)=MoIenc

    and I found that B=MoNI/2pir

    b.) the magnetic field is 0 outside the loop
  2. jcsd
  3. Mar 26, 2008 #2


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    Staff Emeritus
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    Gold Member

    Yes, you are correct.

    For future reference we have Homework forums, for such questions where your query may receive more attention.
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