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Homework Help: Magnetic field strength against current

  1. Mar 11, 2007 #1
    1. The problem statement, all variables and given/known data
    Hi after doing a experiment at school, I have come up with a graph of magnetic field strength against current. I was wondering if anyone knew what the gradent of this line or area under the line represented?

    2. Relevant equations


    3. The attempt at a solution

    googling now to try and find out!

    Please Help!
  2. jcsd
  3. Mar 11, 2007 #2
    Fingers crossed

    Im going to bed now:zzz: , but will have a look in the morning, hopefully to some help:biggrin: !

  4. Mar 11, 2007 #3


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    Gold Member

    It's hard to say, because you haven't described the experimental setup. The graph would be different for the field outside a wire and the field in a coil, for instance.
  5. Mar 11, 2007 #4

    The set up used was a compass on a support frame with 5 turns of wire around it. We used the tan (theta) to represent the magnetic field strength of the wire as it is directly proportional. The magnetic field strength of the earth was an unknown constant.
    Last edited: Mar 11, 2007
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