Question

Electrical resistance of certain materials, known as superconductors, changes abruptly from a nonzero value to zero as their temperature is lowered below a critical temperature $T_C\left(0\right)$. An interesting property of superconductors is that their critical temperature becomes smaller than $T_C\left(0\right)$ if they are placed in a magnetic field, i.e., the critical temperature $T_C\left(B\right)$ is a function of the magnetic field strength B. The dependence of $T_C\left(B\right)$ on B is shown in the figure.

• A. D
• B. A
• C. B
• D. C

Answer 1

The correct option is B A

Solution