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Category: Science
Date: 05/22/09 12:00 PM

33 Responses to Eddy Currents Are Mind-Boggling [Video]

  1. Profile photo of sewermonkey
    sewermonkey Male 30-39
    281 posts
    May 21, 2009 at 4:27 pm
    Link: Eddy Currents Are Mind-Boggling - I don`t know how this works or who Eddy is, but I love his physics!
  2. Profile photo of smartbomb314
    smartbomb314 Male 13-17
    1220 posts
    May 22, 2009 at 12:05 pm
    WOAH........WOAH
  3. Profile photo of Swaywithme
    Swaywithme Female 18-29
    3696 posts
    May 22, 2009 at 12:05 pm
    ...He`s a witch! Throw him into the pond!
  4. Profile photo of PacoP42
    PacoP42 Male 13-17
    1064 posts
    May 22, 2009 at 12:07 pm
    :o that was kinda cool actually.
  5. Profile photo of rogerroger
    rogerroger Male 18-29
    82 posts
    May 22, 2009 at 12:27 pm
    It works because the matter of the tube resists the change in the immediate magnetic field by creating an opposing one. It`s similar to a drag force!
  6. Profile photo of spocksbeard
    spocksbeard Male 18-29
    55 posts
    May 22, 2009 at 12:40 pm
    :o Get Eddy out of the tube`s time space continuum!
  7. Profile photo of D3
    D3 Male 13-17
    725 posts
    May 22, 2009 at 12:52 pm
    WHAT THE SH*T?
    WITCH!
    KILL IT WITH FIRE!
  8. Profile photo of DaisyDope
    DaisyDope Female 13-17
    299 posts
    May 22, 2009 at 1:02 pm
    Magic O.o
  9. Profile photo of RandyTheFool
    RandyTheFool Male 18-29
    820 posts
    May 22, 2009 at 1:55 pm
    D3: "WHAT THE SH*T?
    WITCH!
    KILL IT WITH FIRE!"

    How do you know he`s a witch? Did he turn you into a newt (and then you got better)?

  10. Profile photo of unreedemed
    unreedemed Male 13-17
    546 posts
    May 22, 2009 at 2:01 pm
    thats cool :DD
    is it magnets?
  11. Profile photo of CrakrJak
    CrakrJak Male 40-49
    17515 posts
    May 22, 2009 at 2:28 pm
    This is sort of related to this.
    Floating Magnet
  12. Profile photo of SPARTAKITTY
    SPARTAKITTY Female 18-29
    2123 posts
    May 22, 2009 at 4:28 pm
    @RandyTheFool
    Does he weigh the same as a duck?
  13. Profile photo of drummfreak
    drummfreak Male 13-17
    62 posts
    May 22, 2009 at 6:03 pm
    ive done that before ecept it was my friend and giant kiddyslide.....nah not really i just wanted to feel special but thats still awesome
  14. Profile photo of Sajo
    Sajo Male 18-29
    436 posts
    May 22, 2009 at 8:37 pm
    @ Randy: Didn`t see his nose, don`t know if it`s a carrot or not!

    Ontopic: That was pretty awesome.

  15. Profile photo of tnaran
    tnaran Male 30-39
    220 posts
    May 22, 2009 at 9:25 pm
    Yes, neudynium magnets: http://en.wikipedia.org/wiki/Neodymium_m...

    My favorite demonstration of eddy currents was the director of a company that makes MRI`s in England. He took an aluminum disk (aluminum is not a ferro magnet so you can bring it into strong magnetic fields), put it upright inside the MRI chamber then let it go. It fell in slow motion because of eddy currents.

    Now do you know why Magneto was the most powerful mutant in the X-men universe? :-)
    (I know, I know, he wasn`t, but it was a good ending line for me)

  16. Profile photo of Binary101
    Binary101 Male 13-17
    846 posts
    May 22, 2009 at 9:50 pm
    Sweet! Its the leftover charge from a solenoid isn`t it?
  17. Profile photo of iluvpink13
    iluvpink13 Female 18-29
    1414 posts
    May 22, 2009 at 11:15 pm
    looks like magnets
  18. Profile photo of superdud3
    superdud3 Male 18-29
    277 posts
    May 22, 2009 at 11:53 pm
    hurra for magnets and their awsome slomo falling levitating abilitys
  19. Profile photo of xmastree_ph
    xmastree_ph Male 40-49
    416 posts
    May 23, 2009 at 12:28 am
    Sweet! Its the leftover charge from a solenoid isn`t it?

    If I remember from college, the falling magnet induces current in the copper tube. That current creates a magnetic field which tries to stop the magnet falling. It can`t actually stop it though, since if it did there would be no current and therefore no field to hold it.

  20. Profile photo of opiebreath
    opiebreath Female 18-29
    15782 posts
    May 23, 2009 at 1:31 am
    Aaaand this is why I`m bad at physics.

    o_O

  21. Profile photo of Masticore
    Masticore Male 18-29
    109 posts
    May 23, 2009 at 4:08 am
    >It can`t actually stop it though, since if it did there would be no current and therefore no field to hold it.

    Correct. This is the same reason that induction motors always run at a speed that is slower than the rotating magnetic field.

    >opie

    To be fair, this is deep enough into the minutiae of electromagnetism that you really need vector math to describe what is going on.

    And when you dive into vector calculus, you find funny things such as integrating the curl of a field around a perimeter, and the integrating the flux of the same field through a surface bounded by that perimeter, and getting the same answer.

  22. Profile photo of toans
    toans Male 13-17
    413 posts
    May 23, 2009 at 4:19 am
    can you use any copper tube?
    i wanna try this
  23. Profile photo of Masticore
    Masticore Male 18-29
    109 posts
    May 23, 2009 at 4:24 am
    >can you use any copper tube?

    you need any tube that can conduct electricity in a loop around its circumference. Copper is one such material.

    The harder thing to get, really, is an appropriate magnet to drop down the tube.

  24. Profile photo of CreamKreator
    CreamKreator Male 30-39
    69 posts
    May 23, 2009 at 6:27 am
    http://www.youtube.com/watch?v=fxC-AEC0R... the same effect but reversed, big magnet (MRI) and aluminium block.
  25. Profile photo of dairy
    dairy Male 18-29
    382 posts
    May 23, 2009 at 10:41 am
    so....what exactly was cool about that video? like...did anything special happen to the nut as it fell down the pipe??

    I really dont understand physics...

  26. Profile photo of DavioMagnifi
    DavioMagnifi Male 13-17
    600 posts
    May 23, 2009 at 2:56 pm
    "so....what exactly was cool about that video? like...did anything special happen to the nut as it fell down the pipe??"

    Are you really that stupid? the nut slowed down. God pay attention or just go to e baums world or something

  27. Profile photo of Tonyjet
    Tonyjet Male 18-29
    3299 posts
    May 23, 2009 at 5:35 pm
    they looked like magnets
  28. Profile photo of idiotfilter
    idiotfilter Male 18-29
    3916 posts
    May 24, 2009 at 10:05 am
    that....was....so....cool...
  29. Profile photo of polkafromny
    polkafromny Female 18-29
    376 posts
    May 25, 2009 at 12:51 am
    omg this is cool ^^
  30. Profile photo of VomitStorm
    VomitStorm Male 18-29
    97 posts
    May 26, 2009 at 11:33 am
    dairy is a retard, go back to reading tabloids and watching britains got talent you lame fag
  31. Profile photo of konablend
    konablend Male 18-29
    80 posts
    May 26, 2009 at 11:08 pm
    I actually know how this works , lol. The "nut" is actually a magnet, the pipe is copper, a non-ferrous metal, so it wont be attracted to, or by the magnet. However, copper, when in the presence of a moving magnetic field will generate an electrical current, or in this case, an opposing magnetic field, slowing the descent of the magnet through the pipe. Kids, try this at home.
  32. Profile photo of alucard6650
    alucard6650 Male 70 & Over
    21 posts
    August 25, 2009 at 11:41 pm
    nice lol

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