Question

Superconductors shows (a) perfect diamagnetism (b) perfect conductivity (c) magnetic levitation (and) meissner effect neet

Answer 1

Explanation:

(a) Perfect Diamagnetism :

A superconducting material kept in a magnetic field expels the magnetic flux out its body when cooled below the critical temperature and exhibits perfect diamagnetism. This is called MEISSNER EFFECT. ... The flux density penetrates the specimen again at T=T_c and the material turns to the normal state.

(b) Perfect conductivity :

A perfect conductor or perfect electric conductor (PEC) is an idealized material exhibiting infinite electrical conductivity or, equivalently, zero resistivity (cf. ... Another example is electrical circuit diagrams, which carry the implicit assumption that the wires connecting the components have no resistance.

(c) magnetic levitation (and) meissner effect neet:

Any magnetic fields that were passing through must instead move around it. When a magnet is placed above a superconductor at critical temperature, the superconductor pushes away its field by acting like a magnet with the same pole causing the magnet to repel, that is, “float”—no magical sleight of hand required.

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Answer 2

SUPER CONDUCTORS show :-

a) PERFECT DIAMAGNETISM is a phenomenon occurring in certain materials at low temperatures like superconductors, characterised by the complete absence of magnetic permeability which means magnetic susceptibility of the material is -1. No internal magnetic field is produced in case of perfect diamagnetism.

This phenomenon is also known as super diamagnetism. Superconductors show super diamagnetism.

b) PERFECT CONDUCTIVITY is the phenomeon which are observed in superconductors in which the internal resistence of the material become 'zero' and hence current flow through the material without any significant loss in its energy.It is also know as super conductivity. Super conductors show perfect conductivity.

c) MEISSNER EFFECT is the phenomenon in which the superconductive material expels all its interior fields and hence it can often cause magnetic leviation . Meissner effect is shown by superconductors

d) MAGNETIC LEVIATION is the method in which the sulerconductive material is suspended in the air without any physical support. In this process magnetic fields are use to counter the gravitational forces. Magnetic leviation can be seen in supercinductors.