what is superconducter?

Answer 1

They have zero resistance and infinite conductivity.

No superconductor practically exists... it is hypothetical.....just an idea.

Answer 2

Superconductor:
Superconductor is a material that shows extremely low temperatures, characterized by exactly zero electrical resistance and the exclusion of the interior magnetic field (the Meissner effect).

The electrical resistivity of a metallic conductor decreases gradually as the temperature is lowered. However, in ordinary conductors such as copper and silver, impurities and other defects impose a lower limit. Even near absolute zero a real sample of copper shows a non-zero resistance. The resistance of a superconductor, on the other hand, drops abruptly to zero when the material is cooled below its "critical temperature", typically 20 kelvin or less. An electrical current flowing in a loop of superconducting wire can persist indefinitely with no power source. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It cannot be understood simply as the idealization of "perfect conductivity" in classical physics.

Superconductivity occurs in a wide variety of materials, including simple elements like tin and aluminium, various metallic alloys and some heavily-doped semiconductors. Superconductivity does not occur in noble metals like gold and silver, nor in most ferromagnetic metals.

In 1986 the discovery of a family of cuprate-perovskite ceramic materials known as high-temperature superconductors, with critical temperatures in excess of 90 kelvin, spurred renewed interest and research in superconductivity for several reasons. As a topic of pure research, these materials represented a new phenomenon not explained by the current theory. And, because the superconducting state persists up to more manageable temperatures, more commercial applications are feasible, especially if materials with even higher critical temperatures could be discovered.

Answer 3

Superconductors are characterised by :-
(1) exactly zero electrical resistance
(2) it excludes interior magnetic field ( Meissner Effect)
Super conductivity is a phenomenon occurring in certain materials at extremely low temperature.

The resistance of a super conductor drops exactly to zero when the material is cooled to below its critical temperature, typically 20 kelvin or less. THE CURRENT FLOWING IN A SUPERCONDUCTOR INDEFINITELY PERSISTS WITH NO POWER SOURCE.

Whereas in an ordinary conductor, the flow of electrons bump up the lattice and heat up the material. Hence energy is lost, electrical current diminishes in the intensity. In a superconductor the flowing electrons bind to each other in an arrangement called Cooper pairs. Electrons flow endlessly without resistance.

Superconductivity is a quantum mechanical phenomenon - an idealisation of " PERFECT CONDUCTIVITY ".

Examples of superconductors are certain metals like Tin, aluminium and various metallic alloys and some heavily doped semiconductors.

A super conductor that I worked on was like a magnet,and cooled with liquid helium . It is part of a very low noise amplifier. After it is cooled down which is actually very cold u can start the current to flowing and then short the inductor out and as long as it is cold it will have a minus resistance. For safety if the temperature rose very much the shorting relay would drop out and put in some resistors to dissipate the energy


Superconductor:
Superconductor is a material that shows extremely low temperatures, characterized by exactly zero electrical resistance and the exclusion of the interior magnetic field (the Meissner effect).

The electrical resistivity of a metallic conductor decreases gradually as the temperature is lowered. However, in ordinary conductors such as copper and silver, impurities and other defects impose a lower limit. Even near absolute zero a real sample of copper shows a non-zero resistance. The resistance of a superconductor, on the other hand, drops abruptly to zero when the material is cooled below its "critical temperature", typically 20 kelvin or less. An electrical current flowing in a loop of superconducting wire can persist indefinitely with no power source. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It cannot be understood simply as the idealization of "perfect conductivity" in classical physics.

Superconductivity occurs in a wide variety of materials, including simple elements like tin and aluminium, various metallic alloys and some heavily-doped semiconductors. Superconductivity does not occur in noble metals like gold and silver, nor in most ferromagnetic metals.

In 1986 the discovery of a family of cuprate-perovskite ceramic materials known as high-temperature superconductors, with critical temperatures in excess of 90 kelvin, spurred renewed interest and research in superconductivity for several reasons. As a topic of pure research, these materials represented a new phenomenon not explained by the current theory. And, because the superconducting state persists up to more manageable temperatures, more commercial applications are feasible, especially if materials with even higher critical temperatures could be discovered.

All metals are conductors of electricity; anyhow they have some resistance to the the flow of electricity through them. A superconductor is one which offers no resistance to the flow of electricity. As the temperature decreases, the resistance falls. Since it is not possible to attain absolute zero, no perfect or ideal superconductor exists now; we only have materials with "increased conductance".

when temperature decreased to a range of absolute zero(0 K) the resistance disappears and the metal gets infinite conductivity , such conductors are known as super conductors.

Answer 4

Superconductors are characterised by :-
(1) exactly zero electrical resistance
(2) it excludes interior magnetic field ( Meissner Effect)
Super conductivity is a phenomenon occurring in certain materials at extremely low temperature.

The resistance of a super conductor drops exactly to zero when the material is cooled to below its critical temperature, typically 20 kelvin or less. THE CURRENT FLOWING IN A SUPERCONDUCTOR INDEFINITELY PERSISTS WITH NO POWER SOURCE.

Whereas in an ordinary conductor, the flow of electrons bump up the lattice and heat up the material. Hence energy is lost, electrical current diminishes in the intensity. In a superconductor the flowing electrons bind to each other in an arrangement called Cooper pairs. Electrons flow endlessly without resistance.

Superconductivity is a quantum mechanical phenomenon - an idealisation of " PERFECT CONDUCTIVITY ".

Examples of superconductors are certain metals like Tin, aluminium and various metallic alloys and some heavily doped semiconductors.

Gold and Silver are not superconductors.

Answer 5

A super conductor that I worked on was like a magnet,and cooled with liquid helium . It is part of a very low noise amplifier. After it is cooled down which is actually very cold u can start the current to flowing and then short the inductor out and as long as it is cold it will have a minus resistance. For safety if the temperature rose very much the shorting relay would drop out and put in some resistors to dissipate the energy.

Answer 6

All metals are conductors of electricity; anyhow they have some resistance to the the flow of electricity through them. A superconductor is one which offers no resistance to the flow of electricity. As the temperature decreases, the resistance falls. Since it is not possible to attain absolute zero, no perfect or ideal superconductor exists now; we only have materials with "increased conductance".

Answer 7

when temperature decreased to a range of absolute zero(0 K) the resistance disappears and the metal gets infinite conductivity , such conductors are known as super conductors.It shows dia-magnetism
In super conductors Cooper-pairs are the charge caries.
These are used in,
1.no loss transmssion
2.super computers
3.crayogenics

Answer 8

Zero Resistance... Infinite Conductivity...!!!

Answer 9

a superconductor is a substance that conducts electricity with minute resistance under certain conditions such as very low temperatures

Answer 10

superconductor is a subs which has zero resistance evry element has a particular temp tat is very low at wich the substans shows tis property