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Magnetic currents in eddy tube (video)

 
 
Reply Mon 27 Apr, 2009 01:46 pm
Why does this happen exactly?



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Type: Discussion • Score: 1 • Views: 1,993 • Replies: 7
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High Seas
 
  1  
Reply Mon 27 Apr, 2009 01:51 pm
@rosborne979,
Lentz's law
http://hyperphysics.phy-astr.gsu.edu/Hbase/electric/farlaw.html
http://www.darylscience.com/Demos/Lentz.html
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chai2
 
  1  
Reply Mon 27 Apr, 2009 02:02 pm
I'm not sure what happened.

Was it sort of floating through the tube?
rosborne979
 
  1  
Reply Tue 28 Apr, 2009 07:19 am
@chai2,
chai2 wrote:

I'm not sure what happened.

Was it sort of floating through the tube?

Yeh, it kind of "floated" down the tube instead of just falling at normal speed. The movement of the magnet through the tube causes an electric field which resists the movement of the magnet, slowing it down. Pretty neat Smile
chai2
 
  1  
Reply Tue 28 Apr, 2009 09:37 am
@rosborne979,
indeed it is.
High Seas
 
  1  
Reply Tue 28 Apr, 2009 09:46 am
@chai2,
The only reason I remembered the laws from long-ago physics classes is that I fell in love with a piece of furniture (bed or table, as you wish) that floats in the air >
http://tbn3.google.com/images?q=tbn:x9yPgmotlMa3tM:http://bedzine.com/blog/wp-content/uploads/2007/02/21082006141343-0.gif
http://bedzine.com/blog/bed-frame/magnetic-floating-bed/
> though I was warned not to stick my foot under it, specially if wearing shoes with metal buckles. I love it, but it cost more than I would usually pay for furniture, plus I've no idea how much it might cost in electricity usage.
rosborne979
 
  1  
Reply Tue 28 Apr, 2009 03:20 pm
@High Seas,
Pretty neat. And only $1.5million. Might not be good if you have a pacemaker though (or anything with iron in it).
High Seas
 
  1  
Reply Tue 28 Apr, 2009 04:05 pm
@rosborne979,
Beauty first, practicality follows - that IS the entire tale of Western Civilization, Rosborne Smile "Form follows function" is the feedback loop, in case you wondered, but the converse also seems true, making BOTH statements blindingly obvious and logically consistent, QED.
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