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Homework Help: Magnetism and electromagnetism

  1. Mar 19, 2007 #1
    If you place a metal ring in a region in where a magnetic field is rapidly alternating, the ring may become hot to your touch. Why?


    Is it because a changing magnetic field can create electric fields? I AM SO CONFUSED...and it seems so simple?!?!?!?
     
  2. jcsd
  3. Mar 19, 2007 #2
    Well, I wouldn't call it simple.
    You have a few more steps to explain why it gets hot.
    Any other remarks?
     
  4. Mar 19, 2007 #3
    can you give me a hint?
     
  5. Mar 19, 2007 #4
    What does deflecting mean?
     
    Last edited: Mar 19, 2007
  6. Mar 19, 2007 #5
    I dont know, why?
    Hint: what will an electric field do inside of the conductor?
     
  7. Mar 19, 2007 #6
    I thought that it might have something to do with it... I was lost.

    Is it because the voltage is increased? I don't know... I am trying. Thank you for helping me.
     
  8. Mar 19, 2007 #7
    A changing magnetic flux, here you can think of it as just a changing magnetic field, induces an emf in the ring. What will happen in the ring with this induced emf acting?
    (Faraday's/Lenz's law is a bit confusing) ; )
     
  9. Mar 19, 2007 #8
    Okay... I got it, I think... Thank you so much. Sorry if I annoyed you.
     
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