Question

i. What are the two necessary conditions for a material to be a superconductor?
ii. Differentiate between Type-I and Type-II superconductor, using the plot of magnetic field vs. temperature.
iii. Find out the energy gap at absolute zero temperature, (0) for 3e, if its
superconducting critical temperature,
is 23.2 . Radiations of what minimum frequency can break apart Cooper pairs in 3e at = 0 .

Answer 1

Explanation:

(1) Type – I Superconductors: Low Temperature Superconductors. (2) Type – II Superconductors: High Temperature Superconductors. Perfectly obey the Meissner effect: Magnetic field cannot penetrate inside the material. Partly obey the Meissner effect but not completely: Magnetic field can penetrate inside the material.

Answer 2

Answer:

1.The material must be cooled below a characteristic temperature, known as its superconducting transition or critical temperature (Tc). The current passing through a given cross-section of the material must be below a characteristic level known as the critical current density (Jc).

2.(1) Type – I Superconductors: Low Temperature Superconductors. (2) Type – II Superconductors: High Temperature Superconductors. Perfectly obey the Meissner effect: Magnetic field cannot penetrate inside the material. Partly obey the Meissner effect but not completely: Magnetic field can penetrate inside the material