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CLIP 13760

Superconductors and the Meissner effect

Superconductors and the Meissner effect
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Key Info
  • Superconductors and the Meissner effect
  • Duration: 03:53
  • Mark Miodownik describes how, following the discovery of superconductivity in 1911, scientists researched other materials in an attempt to raise the critical temperature, below which superconductivity occurs. He uses a piece of yttrium barium copper oxide (a ceramic) that exhibits superconductivity when cooled using liquid nitrogen at -196 degrees Celcius. The Meissner effect is seen, with Mark levitating a magnet above the piece of ceramic. He explains this phenomenon using an animation of the induced current and the repulsion between the two fields. The potential for superconductors in power transmission is then discussed. First broadcast in the Learning Zone on BBC2 in May 2012 as part of the programme Materials: How They Work.
  • Subject:

    Science

       Topic:

    Phys: Electricity - Conduction and Transmission

  • Keywords: Superconductor, superconduction, superconductivity, Meissner, magnet, maglev, induction, MaterialsHowTheyWork
Ideas for use in class
  • To demonstrate the Meissner effect as a stimulus in a discussion about the limitations and potential uses of superconductors. Can be used in conjunction with 13752
Background details
  • Clip language : English
  • Aspect ratio : 16x9

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