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

The transition temperature of mercury is____________?

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

At transition temperature the value of critical field is____________?

A. Zero
B. negative real value
C. Positive real value
D. Complex value

By increasing impurity content in the metal alloy the residual resistivity always_____________?

A. Decreases
B. Increases
C. Remains constant
D. Becomes temperature independent

The coils of D.C. motor starter are wound with wire of_______________?

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

An H.R.C. fuse is_______________?

A. A ceramic body having metal and caps
B. A wire of platinum
C. A heavy cross-section of copper or aluminium
D. A ceramic tube having carbon rod inside it

The conductors have transport phenomena of electrons due to____________?

A. Electric field
B. Magnetic field
C. Electromagnetic field
D. None of the above

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

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

Mercury as an electric contact material is_______________?

A. A liquid
B. A metal
C. A metal liquid
D. A gas

On which of the following factors does the resistivity of a material depend ?

A. Resistance of the conductor
B. Area of the conductor section
C. Length of the conductor
D. All of the above