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A superconductor has Tc(0)=100K. When a ...

A superconductor has `T_c(0)=100K`. When a magnetic field of `7*5tesla` is applied, its `T_c` decreases to `75K`. For this material, one can definitely say that when

A

`B = 5 " tesla, " T_(C) = 80 K`

B

`B = 5 " tesla , " 75 K lt T_(C) lt 100`

C

`B = 10 " tesla, " 75 K lt T_(C) lt 100 K`

D

`B = 10 " tesla, " T_(C) = 70 K`

Text Solution

Verified by Experts

The correct Answer is:
b
Without magnetic field `T_(c) = 100K`. When magnetic field of `7.5`T is applied then critical temperature falls to 75K. If we decrease magnetic field below `7.5`T then the critical temperature must lie between 75K and 100K. Hence, option (b) is correct.
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