Super conductivity can be destroyed by_____________?

Related Mcqs:

1. The structure sensitive property of a super conductor is______________?

   A. critical magnetic field B. transition temperature C. critical current density D. none of the above...

2. Superconducting metal in super conducting state has relative permeability of________________?

   A. zero B. one C. negative D. more than one...

3. The conductivity of a conductor can be increased by_______________?

   A. decreasing its temperature B. increasing its temperature C. decreasing its vibration D. increasing its vibration...

4. Which of the following variety of copper has the best conductivity ?

   A. Induction hardened copper B. Hard drawn copper C. Pure annealed copper D. Copper containing traces of silicon...

5. The conductivity of a metal is determined by____________?

   A. the electronic concentration and the mobility of the free electrons B. the number of valence electrons per atom C. either (A) or (B) D. none of the above...

6. The conductivity of an extrinsic semiconductor with temperature________________?

   A. decreases B. increases C. remains constant...

7. The converse of hardness is known as______________?

   A. malleability B. toughness C. softness D. none of the above...

8. __________ is the main constituent of glass?

   A. Fe203 B. Si02 C. AI2O3 D. B2O3...

9. Platinum is used in_____________?

   A. electrical contacts B. thermocouple C. heating element in high temperature furnace D. grids of special purpose vacuum tubes E. all of the above...

10. The current due to electron flow in conduction band is the hole current in valence band?

    A. equal to B. less than C. greater than D. any of the above...