Consider the following statements:1. Superconductors exhibit normal conductivity behaviour above a transition temperature Tc2. Superconductors lose their superconducting nature in an external magnetic field, provided the external magnetic field is above a critical value.3. High Tc, superconductors have T, values in the range 1 to 10 K.Which of the above statements are correct?1. 1 and 2 only2. 1 and 3 only3. 2 and 3 only4. 1, 2 and 3

Consider the following statements:1. Superconductors exhibit normal co

1.	Consider the following statements:1. Superconductors exhibit normal conductivity behaviour above a transition temperature Tc2. Superconductors lose their superconducting nature in an external magnetic field, provided the external magnetic field is above a critical value.3. High Tc, superconductors have T, values in the range 1 to 10 K.Which of the above statements are correct?1. 1 and 2 only2. 1 and 3 only3. 2 and 3 only4. 1, 2 and 3
Answer» Correct Answer - Option 1 : 1 and 2 only For temperature above transition temperature T_c a superconductor transforms to normal conductor. When applied magnetic field is greater than the critical magnetic field H > H_c a super conductor becomes a normal conductor. High T_c super conductors have T_c > 50° K

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