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Superconductivity UPSC NOTE

 


What is superconductivity?

  • Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic flux fields are expelled from the material.

What are superconductors?

  • Any material exhibiting these superconductivity properties is a superconductor.

  • A superconductor is a material that can conduct electricity with zero resistance when it is cooled below a certain temperature, known as the critical temperature or Tc.



  • When a superconductor is below this temperature, electrons can move through the material without any resistance, allowing for the creation of extremely powerful magnets and highly efficient electrical systems.

  • An electric current through a loop of superconducting wire can persist indefinitely with no power source.

  • The superconductivity phenomenon was discovered in 1911 by Dutch physicist Heike Kamerlingh Onnes.




  • It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor during its transitions into the superconducting state.

  • Scientists have been searching for a material that can superconduct at room temperature and pressure for decades.


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