Question

281. The order of magnitude of the energy gap of a typical superconductor
is :
(a) 1 MeV
(b) 1 KeV
(c) 1eV
(d) 1 meV​

Answer 1

Answer:

(b) 1KeV is the answer for this question

Answer 2

Answer:

The order of magnitude of the energy gap of a typical superconductor is 1 meV​. So, the correct option for this question is (d) 1 meV​.

Explanation:

The material's thermal energy must be lower than the energy gap for the superconductor to endure; otherwise, random thermal pulses would destroy Cooper pairs and cause the superconductor to revert to its normal state. At a common superconducting temperature range of an element, say 3 K, the average thermal thermal energy is 1/100 of this or 0.25 meV because average thermal energy goes as kT, and at ambient temperature, it is around 25 meV. Therefore, the energy gap should be at least this big. So, 0.1 to 1.0 meV is the range of magnitude.

Thus, the energy gap is not a band gap, symmetric K-points cannot be used to describe it.