EL/Super conductivity/SET-2/Paper-01

Q1. Superconductivity is observed for
(a) infrared frequencies
(b) dc and low frequency
(c) AC and high frequency
(d)frequency having no effect

Ans:b
Q2. superconductivity can be destroyed by

(a) adding impurities
(b) reducing temperatures
(c) application of magnetic field
(d) any of the above

Ans:c
Q3. Superconducting metal in superconductivity state has relative permeability of

(a) zero           (b) one              (c) negative              (d) more than one

Ans: a
Q4. The super conductivity is due to

(a) the crystal  structure having no atomic vibration at 0^o K
(b)all electronics interact in the super conducing state
(c)the electronics jump into nucleus at 0^o K
(d) none of those

Ans:a

Q5. 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
Ans:c