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Maxium Allowable Current to (+/-) 2% ?

  1. Mar 24, 2009 #1
    Maxium Allowable Current to (+/-) 2% ???

    1. The problem statement, all variables and given/known data

    An experiment on the Earth's magnetic field is being carried out 7.00 from an electric cable.
    What is the maximum allowable current in the cable if the experiment is to be accurate to 2.0 ? Assume that Earth’s magnetic field is .


    2. Relevant equations

    B = [I*μ]/[2*Pi*d]

    3. The attempt at a solution

    Check the picture to see how far I've gotten, but it's still wrong. I'm not sure how to attempt this problem.
     

    Attached Files:

  2. jcsd
  3. Mar 24, 2009 #2
    Re: Maxium Allowable Current to (+/-) 2% ???

    So any suggestions mates?

    Melqarthos
     
  4. Mar 26, 2009 #3
    Re: Maxium Allowable Current to (+/-) 2% ???

    you have to use 1750 * 2.0%

    1750 * 0.02 = 35 A
     
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