Magnetics 6 Question 21
21. In the graphs below, the resistance $R$ of a superconductor is shown as a function of its temperature $T$ for two different magnetic fields $B _1$ (solid line) and $B _2$ (dashed line). If $B _2$ is larger than $B _1$, which of the following graphs shows the correct variation of $R$ with $T$ in these fields? (a)
(b)
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Solution:
- If $B _2>B _1$, critical temperature, (at which resistance of semiconductors abruptly becomes zero) in case 2 will be less than compared to case 1.
