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Homework Help: Magnetic Field in cylinder

  1. Apr 10, 2012 #1
    1. The problem statement, all variables and given/known data
    A conducting cylinder of radius r0 carries a current I uniformly throughout its
    volume. Find an expression for the magnetic field H at a distance r from the
    axis of the cylinder (a) for r < r0 , and (b) for r > r0 .

    2. Relevant equations

    Biot-Savart Law
    Amperes Law

    3. The attempt at a solution

    I am not sure if this is correct

    a) H=i*dL*sin(\theta)/4pi*r^2 for r < r0

    b) H=i*dL*cos(\theta)/4pi*r^2 for r > r0

  2. jcsd
  3. Apr 11, 2012 #2


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    Science Advisor
    Homework Helper

    Hi Paymemoney! :smile:

    (try using the X2 and X2 buttons just above the Reply box :wink:)
    uhh? what's dL? what's θ? :confused:

    use ∫ H.dl round a circle​
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