1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Magnetic coil problem

  1. Apr 11, 2006 #1
    I don't know how to answer these questions. :(
    I know the alternating current makes the magnetic field changes. And the changing magnetic field generates emf.But I don't know why the emf is large enough to push the aluminum ring upward, and how come it goes up?

    thx a lot.
  2. jcsd
  3. Apr 12, 2006 #2


    User Avatar
    Science Advisor
    Homework Helper

    A few more details might help but I would examine the Lorentz force acting on the electrons that were set in motion by the induced EMF.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook