Which of the following statements are correct? 1. Superconductors are amorphous thin films of Be, Bi and Fe. 2. Soft superconductors observe Silsbee s rule. 3. Hard superconductors observe high critical field and transition temperature.

Which of the following statements are correct? 1. Superconductors are

1.	Which of the following statements are correct? 1. Superconductors are amorphous thin films of Be, Bi and Fe. 2. Soft superconductors observe Silsbee s rule. 3. Hard superconductors observe high critical field and transition temperature.
A.	1 only
B.	1 and 2 only
C.	2 and 3 only
D.	1, 2 and 3
Answer» E.

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Which of the following statements are correct? 1. Superconductors are amorphous thin films of Be, Bi and Fe. 2. Soft superconductors observe Silsbee s rule. 3. Hard superconductors observe high critical field and transition temperature.

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