Magnet Magic / Super Conductors

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Conductors Magic Magnets Super
brucegray666
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    brucegray666
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  • Added: 08-Jan-08

This is an excellent demo of super conductivity. The liquid is liquid nitrogen. The disk is a magnet. The black block is the super conducting (SC) material (but becomes SC only below its critical temperature, somewhat higher than liquid nitrogen).

When warm, the block has no particular magnetic / electric properties. When cooled, it becomes a SC. One of the properties of a SC is that magnetic fields can be pinned in place in the SC.

A moving magnetic field generates eddie currents within conductors, and can be felt as a resistance to relative motion. In most materials, this current quickly decays due to electrical resistance. In SC, eddie currents do not decay, but instead will tend to hold the magnetic field in place.

  1. Categories: Science & Tech
Comments on

Magnet Magic / Super Conductors

6 Comments | Add Comment
  • Don't know about ...

    Don't know about the cost of it but I do know that it impossible to cool anything below absolute zero - it just cant be done!

    By brucegray666 [Affiliate User] 1214705146 Reply Spam Moderate Up Moderate Down
  • that kind of gas ...

    that kind of gas cause too much right..?? and it must be cooled below absolute zero

    By DeathXLight28 [Affiliate User] 1214687575 Reply Spam Moderate Up Moderate Down
  • see how slowly it ...

    see how slowly it landed, wow :)

    By Siruiel [Affiliate User] 1213422043 Reply Spam Moderate Up Moderate Down
  • so... It looks like ...

    so... It looks like the kinetics just stop when that superconducting thing is super cooled... cooool....

    By MrFairygodmother [Affiliate User] 1212619151 Reply Spam Moderate Up Moderate Down
  • however.... wouldnt ...

    however.... wouldnt you need to put a lot of energy in to maintain the vacuum??? i see your thinking tho.

    By brucegray666 [Affiliate User] 1202521490 Reply Spam Moderate Up Moderate Down
  • Brain wave!! While ...

    Brain wave!! While sc's only work a very low temperature's , they still can have super insulaters and if a magnet can be suspended in a vaccium you could spin it at a very high velocity. Which could hold a lot of energy.

    By hydrogenman15 [Affiliate User] 1200852498 Reply Spam Moderate Up Moderate Down
6 Comments | Add Comment