1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Square Loop

  1. Dec 1, 2009 #1
    1. The problem statement, all variables and given/known data
    A square loop of wire with a side of 10cm carries a current of 0.3A. What is the
    magnetic field in the center of the square loop?


    2. Relevant equations

    B= 2([tex]\sqrt{}[/tex]2)[tex]\mu[/tex]I/[tex]\pi[/tex]L

    [tex]\mu[/tex]=IA


    3. The attempt at a solution

    Not sure if these are the right equations for this problem and if they aren't then I have no idea what to do. If they are then I just need to know what the area would be.
     
  2. jcsd
  3. Dec 1, 2009 #2
    Can you find a magnetic field created by 1 segment of a loop? It is similar to finding a magnetic field caused by long wire with current I.
     
  4. Dec 1, 2009 #3
    B= [tex]\mu[/tex]I/ 2[tex]\pi[/tex]a

    Is this right?
     
  5. Dec 1, 2009 #4
    sqrt(2), i think.
     
  6. Dec 2, 2009 #5
    so B= ([tex]\sqrt{}[/tex]2)[tex]\mu[/tex]I/2[tex]\pi[/tex]a ?
     
  7. Dec 2, 2009 #6
    It is just a magnitude of field due to 1 segment of a loop. Multiply it with 4. :)
     
  8. Dec 2, 2009 #7
    ok so that equation times 4. Thanks
     
  9. Dec 2, 2009 #8
    oh and I'm still not really sure what the area would be, I need it to figure out what [tex]\mu[/tex] is.
     
  10. Dec 2, 2009 #9
  11. Dec 2, 2009 #10
    oh yeah, I forgot about that. Thanks again.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...