What is superconductivity?

Question

This is a term of Physics

Answer 1

Superconductivity is an effect in certain materials. It is caused by quantum mechanical effects. When a material becomes superconducting, its electrical resistivity drops to zero. The effect was discovered fortuitously in mercury metal by the research group that first liquified helium gas.

The topic of superconductivity is a large one, some topics for your reading list: "BCS Theory", "Type 1 Superconductivity", "Type 2 Superconductivity", "Meissner flux exclusion", "Flux pinning", "SQUIDs", "Josephson junctions", and more.

Answer 2

Ohm's regulation not often applies precisely in actual life, through fact resistance many times relies upon on present day. besides the fact that that's rather close for what are called Ohmic conductors. opposite to what some have stated, the resistance of a superconductor is strictly 0. it incredibly is been measured to be below approximately 10^-34 ohms. What this capacity is that a present day can bypass with out an linked voltage. it incredibly is through fact the voltage represents the capability the electrons lose via flowing - and in a superconductor they lose none. It capacity which you incredibly want a present day source (like a photocell) quite than a voltage source (like a battery or the mains) to get a present day to bypass. frequently, what's finished with a superconductor is that a vulnerable link is created interior the circuit. this could nicely be slightly superconductor it incredibly is stored heat, and so would not have 0 resistance. this facilitates the present source to force a present day throughout the time of the superconductor. as quickly as the present is time-honored, the vulnerable link is cooled and the completed circuit superconducts. the present source can then be became off. the present will bypass undiminished continually. Superconducting magnets working like this carry their container indefinitely offered they are stored cool - its how NMR scanners paintings.

Answer 3

Superconductivity, is the passage of electrons at the speed of light with no slowing down due to resistance. Usually the superconductor has to be cooled to (ideally) absolute zero Temperature, for this superconductivity to occur.

Answer 4

Certain materials, at very low temperatures, lose all electrical resistance. A current in a loop of such material goes on forever. The problem is keeping the temperature low. If you try to extract work from the current, then the resistivity goes up and you lose energy. But, if you have to get current from one place to another its a great technique. The current work, is focussed on finding materials which work at higher temperatures.

Answer 5

It is the ability of a conductor to offer no resistance to a flow of electrons, this condition is usually obtained by lowering the temperature of the conductor to super low levels.

Answer 6

i believe it's a pure conductor. no Resistance.

the holly grail of this is to achieve this in normal room temperature

Answer 7

If you could reduce resistance to zero that would be super C
Experiments have shown this can be approached at super low temps