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Homework Help: Find the current given length and magnetic field strength

  1. May 20, 2012 #1
    1. The problem statement, all variables and given/known data

    What is the current in a long wire if the magnetic field strength 1.0 cm from the wire's axis is 55 mu T.

    i know magnetic field strength which is 1 cm
    i know the length which is 55 milli-tesla.
    I need to find Current in Amperes which is I.

    The chapter gives me the equation down below to use but the question does not give me an angle or a force.

    2. Relevant equations

    Use F = I * L * B sin theta

    3. The attempt at a solution
  2. jcsd
  3. May 20, 2012 #2


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    Homework Helper

    The equation you are looking for is here. Try it and you should get the answer.
  4. May 20, 2012 #3


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    Gold Member

    Check your inputs. It's not about finding the correct number, it's more about understanding the quantities and what they represent.
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