Question

Conductivity of superconductors is____.
(A) Infinite
(B) Very large
(C) Very small
(D) Zero

Answer 1

Hint: Superconductors are objects that drive electricity without resistance. This means that, unlike conventional conductors such as copper or steel, the superconductor can hold current indefinitely without losing power.

Complete solution:
Superconductivity is a collection of visual cues in certain objects where the electrical resistance disappears and the magnetic flux fields are expelled from the content. Evidently with the Meissner effect, complete removal of the magnetic field from the inside of the superconductor during its transition to the excitation mode. Anything that shows this structure is a superconductor. Unlike a typical metallic conductor, its resistance decreases gradually as its temperature is reduced to a minimum, the superconductor has a critical temperature below where the resistance drops suddenly. Electrical power through a power cable can continue indefinitely without a power source.

Additional information: The state of superconductivity was discovered in 1911 by Dutch philosopher Heike Kamerlingh Onnes. Like ferromagnetism and atomic spectral lines, superconductivity is something that can only be explained by quantum machines. The findings of the Meissner result show that extremely dynamic performance cannot be understood as a reflection of the full functionality of classical physics.
Hence, the correct answer is option A.

Note:
The superconductor can be a Type I, which means it has one critical field, above all the missing object and below it when the magnetic field is completely dissipated in the superconductor; or Type II, which means it has two critical fields, each of which allows partial magnetic field intrusion by single points.