IIT-JEE Exam

A superconductors has TC(0) = 100 K. When a magnetic field of 7.5 Tesla is applied, its TC decreases to 75
K. For this material one can definitely say that when
(A) B = 5 Tesla, TC(B) = 80 K (B) B = 5 Tesla, 75 K < TC(B) < 100 K
(C) B = 10 Tesla, 75 K < TC(B) < 100 K (D) B = 10 Tesla, TC(B) = 70 K.

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