Question

(b) A superconducting material has a critical temperature of 3.7 K, and a
magnetic field of 0.0306 tesla at OK. Find the critical field at 2 K.​

Answer 1

Thus the value of the magnetic fields is Hc = 0.0216 Tesla

Explanation:

We are given that:

Critical temperature = 3.7 K

Critical field Hc = 0.306 Tesla

Temperature = 2 K

Solution:

The critical magnetic field  

Hc = Ho [ 1 -  T^2 / Tc^2]

Hc = 0.0306 [ 1 - 2^2 / 3.7^2]

Hc = 0.0306 [ 1 - 4 / 13.69]

Hc = 0.0306  [ 1 - 0.2926 ]

Hc = 0.0306 x 0.7084

Hc = 0.0216 Tesla

Thus the value of the magnetic fields is Hc = 0.0216 Tesla

Answer 2

Answer:Hc= 0.02166

Explanation:Since we need to find the Hc value we can use the formula.

Hc=Ho[1-(T/Tc)²]