Question

The transition temperature for Pb is 7.2 K. However, at 5 K it loses the superconducting property if subjected to magnetic field of

3.3x104A/m. Find the maximum value of H which will allow the metal to retain its superconductivity at 0 K. (Hint: Find H (O))​

Answer 1

Hence the maximum value of H is Ho = 6.37 x 10^4 A/m

Explanation:

Given data:

• Transition temperature = 7.2 K
• Magnetic filed strength = 3.3 x 10^4 A/m

Solution:

The formula is:

Ho = Hc [ 1 - (T / Tc)^2]

Ho = Hc [ 1 - (T / Tc)^2] = 3.3 x 10^4 x [1 - 25 / 51.28]

Ho =  3.3 x 10^4 x [1 - 0.487]

Ho =  3.3 x 10^4 x 0.613

Ho = 6.37 x 10^4 A/m

Hence the maximum value of H is Ho = 6.37 x 10^4 A/m

Answer 2

Answer:

the answer of the question is

1.59 ×10^4