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Magnetism Wire, Loop

  1. Oct 16, 2015 #1
    magnetic_zpswbzqrohl.jpg

    Okay guys I have an hour and thirty minutes before my exam; I know how to do the top problem; just use the formula B = mew x current/(2 x pi x r) then add the magnetic fields and use the right-hand rule to get direction, but I'm stuck on the bottom one.
     
    Last edited: Oct 16, 2015
  2. jcsd
  3. Oct 16, 2015 #2

    Hesch

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    Gold Member

    Lenz's law states, that an induced current in the inner loop will try to prevent a change of flux through the inner loop, induced by the out loop.
     
  4. Oct 16, 2015 #3

    rude man

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    In prob. 5 P is shown at (0.1,0) not at (0,0.1).
    In prob. 6, remember Lenz's law?
     
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