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!

Biot-Savart's law of magnetic field electromagnetic fields

  1. Jan 8, 2012 #1
    Biot-Savart's law of magnetic field " electromagnetic fields"

    1. The problem statement, all variables and given/known data
    A rectangular loop carrying 10 A of current is placed on z=0 plane as shown in figure . Evaluate H at a) (2,2,0)
    b) (4,2,0)
    c) (4,8,0)
    d) (0,0,2)
    2. Relevant equations

    the used equation to answer the problem is
    H= I/4∏ρ * (cosθ2-cosθ1) a∅
    where ρ is the perpendicular distance between the line carrying current and the point which we need to evaluate H at
    a∅=al X aρ
    where aρ is a unit vector along the perpendicular line from the line current to the field point
    3. The attempt at a solution
    i already answered a,b,c and i'm sure about the answers
    but the number d is kinda hard . i solved it with many ways but it seems that i'm misunderstanding something here so i hoped that some1 can help me and tell me
    what's the ρ and aρ is this situation . i just need to know how to get ρ and aρ in the future so i hope whoever answers will concentrate on showing me how to get it . thanks for helping me

    http://www.mediafire.com/?21cwcskwt3yect4 [Broken]
     
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Jan 9, 2012 #2

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Re: Biot-Savart's law of magnetic field " electromagnetic fields"

    Your image is NOT viewable. I don't see it !!!
     
    Last edited by a moderator: May 5, 2017
  4. Jan 9, 2012 #3
    Re: Biot-Savart's law of magnetic field " electromagnetic fields"

    sry here's the picture. it's kinda small idk why. anyway in words the current goes from origin to point (8,0) then from point (8,0) to (8,4) then from point (8,4) to (0,4) then it goes from point (0,4) back to origin
     

    Attached Files:

    • 1.jpg
      1.jpg
      File size:
      1.4 KB
      Views:
      124
  5. Jan 9, 2012 #4
    Re: Biot-Savart's law of magnetic field " electromagnetic fields"

    attachment.php?attachmentid=42581&stc=1&d=1326124670.png

    Let the loop is ABCD
    look at the above pic, By finding the angle of B and Bnet, you can find net mag field
     

    Attached Files:

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook