Question

A material behaves as a superconductor below a critical temperature $T_c$ and as a normal conductor above $T_c$. A magnetic field $\overrightarrow{B} = B\hat{z}$ is applied when $T > T_c$. The material is then cooled below $T_c$ in the presence of $\vec{B}$. Which of the following figures represents the correct configuration of magnetic field lines?

• A.
• B.
• C.
• D.

Answer 1

Answer: (A), (C)

Answer 2

The correct Answrs are (A):,(C):