At transition temperature the value of critical field is____________?

Related Mcqs:

1. The value of critical field below the transition temperature will_______________?

   A. increase
   B. decrease
   C. remain unchanged
   D. any of the above

2. The transition temperature of mercury is____________?

   A. 18.0°K
   B. 9.22°K
   C. 4.12°K
   D. 1.14’K

3. In a superconductor the value of critical density depends upon______________?

   A. magnetic field strength
   B. temperature
   C. either (A) or (B)
   D. both (A) and (B)

4. Total number of crystal systems is____________?

   A. 2
   B. 4
   C. 7
   D. 12

5. In graphite, bonding is____________?

   A. covalent
   B. metallic
   C. Vander Waals
   D. Vander Waals and covalent

6. The metal having the lowest temperature coefficient of resistance is_________________?

   A. gold
   B. copper
   C. aluminium
   D. kanthal

7. Which of the following resistive materials has the lowest temperature co-efficient of resistance ?

   A. Nichrome
   B. Constantan
   C. Kanthal
   D. Molybdenum

8. The resistivity of a metal is a function of temperature because_____________?

   A. the amplitude of vibration of the atoms varies with temperature
   B. the electron density varies with temperature
   C. the electron gas density varies with temperature

9. Which of the following high resistance materials has the highest operating temperature ?

   A. Kanthal
   B. Manganin
   C. Nichrome
   D. Eureka

10. Substances whose specific resistance abruptly decreases at very low temperature are called___________?

    A. insulators
    B. conductors
    C. semiconductors
    D. superconductors