How are superconductors different from conductors?

Question

How are superconductors different from conductors?

Answer 1

they conduct without resistance

Answer 2

Conductors conduct electricity (i.e. copper wire), they have internal resistance which tends to heat up the conductor (I^2*R losses).

Superconductors are special materials (some metal alloys, some cermets, and even some plastics) that conduct electricity at a low temperature with nearly zero resistance.  Problems is the temperatures are usually less than -150 degrees C.  So a lot of energy is used just to keep them cool.  If high temperature (i.e. room temperature) superconductors could be developed, we could potentially have motors the size of your hand that would run a car.

Answer 3

They have much less Resistance to electric current.

  But the super conductors must be cooled cryogenically to close to absolute zero.

Answer 4

superconductors have absolutely no resistance.

For example  current in a superconducting circular wire would go round indefinitely.  

If this could be achieved at norma temperatures instead of very low temps, it would be great for generating magnetic fields to levitate highspeed trains etc etc