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!

Direction of magnetic field inside infinite slab

  1. Apr 17, 2013 #1
    Suppose we have a thick slab with a current density J pointing strictly in x direction...see below link for figure:


    what is direction of magnetic field inside?

    It is easy for me to see that outside, above the slab, it points to the left, and below it, the field points to the right. I get this by visualizing the J as a bunch of current carrying wires all carrying current in +x direction. But using this idea, I think that insidem the field should cancel, although I know that Ampere's law clearly says that there must be a field since there is a net current enclosed...

    If someone could walk me through understanding the direction of the field inside, I would really appreciate it!
  2. jcsd
  3. Apr 19, 2013 #2
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook