A. increase
B. decrease
C. remain unchanged
D. any of the above
Related Mcqs:
- At transition temperature the value of critical field is____________?
A. zero
B. negative real value
C. positive real value
D. complex value - The transition temperature of mercury is____________?
A. 18.0°K
B. 9.22°K
C. 4.12°K
D. 1.14’K - 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) - The metal having the lowest temperature coefficient of resistance is_________________?
A. gold
B. copper
C. aluminium
D. kanthal - Which of the following resistive materials has the lowest temperature co-efficient of resistance ?
A. Nichrome
B. Constantan
C. Kanthal
D. Molybdenum - 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 - Which of the following high resistance materials has the highest operating temperature ?
A. Kanthal
B. Manganin
C. Nichrome
D. Eureka - Substances whose specific resistance abruptly decreases at very low temperature are called___________?
A. insulators
B. conductors
C. semiconductors
D. superconductors - Constantan contains_______________?
A. silver and tin
B. copper and tungsten
C. tungsten and silver
D. copper and nickel - The impurity atoms is semiconductors_____________?
A. inject more charge carriers
B. reduce the energy gap
C. increase the kinetic energy of valence electrons
D. all of the above
