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What are superconductors ?...

What are superconductors ?

Text Solution

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Superconductors are material which have zero resistance at a particular temperature, e.r., mercury is superconductor at `4.2 K`.
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Knowledge Check

  • Superconductors are:

    A
    most exotic diamagnetic materials
    B
    ferromagnetic material with low resistivity
    C
    Paramagnetic materials at high temperature
    D
    none of these

  • which substance acts as superconductor at 4 K ?

    A
    Hg
    B
    Cu
    C
    Na
    D
    Mg

  • The phenomenon of perfect diamagnetism in superconductors is called

    A
    the gyromagnetic effect
    B
    the Meissner effect
    C
    the Weiss effect
    D
    saturation magnetization

    • Similar Questions

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    The oxide TI_(n) , Ca_(2), Ba_(2) Cu_(u) O_(14) is found to be superconductor at 125 K. the value of n is

    The oxide Tl_n Ca_2 Ba_2 Cu_3 O_10 is found to be superconductor at 125 K. The value of n is

    An implies that a perfect diamagnet is a supercondutor. This implies that when a super conductor is put in a magnetic field of intensity B, the magnetic field B_(s) inside the superconductor will be such that :

    Electrical resistance of certain materials, known as superconductors , changes abruptly from a non-zero value to zero as their temperature is lowered below a critical temperature T_c (0) An interesting property of superconductors is that their critical temperature becomes smaller than T_c (0) if they are placed in a magnetic field, that is, the critical temperature T_c (B) is a function of the magnetic field strength B. The dependence of T_c(B) on magnetic field is shown in the below figure . A superconductor has T_(c)(0)=100K . When a magnetic field of 7.5T is applied, its T_(c) decreases to 75K. For this material, one can definetly say that when

    Electrical resistance of certain materials, known as superconductors, changes abruptly from a nonzero value of zero as their temperature is lowered below a critical temperature T_(C) (0) . An interesting property of super conductors is that their critical temperature becomes smaller than T_(C) (0) if they are placed in a magnetic field, i.e., the critical temperature T_(C) (B) is a function of the magnetic field strength B. The dependence of T_(C) (B) on B is shown in the figure. . A superconductor has T_(C) (0) = 100 K . When a magnetic field of 7.5 Tesla is applied , its T_(C) decreases to 75 K. For this material one can difinitely say that when

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