[I] Choose Correct
Answers
1. Hard
superconductors observe (AKTU. 2008-09)
(a) Breakdown of
Silsbee’s rule (b)
Incomplete Meissner effect
(c) High critical
field and transition temperature (d)
All the above.
2. The
Chemical Vapours Deposition is a technique in nanotechnolgy for
(AKTU. 2008-09)
(a) Determination of
the size of nanoparticles
(b) Identification of
nanoparticles
(c) Characterization
of nanoparticles
(d) Synthesis of
carbon nanotubes.
3. Critical magnetic field is given by
(a) 
(b) 
(b) 
(d) 
4. Meissner effect is
(a)
Irreversible (b) Reversible (c) Random (d) Instantaneous
5. The critical field value HC for
type-I superconductor is
(a) very
high (b) very low (c) can’t say (d) None of these
6. The transition temperature vary according to equation
(a) TCM1/3 = constant (b) TCH1/2 = constant
(c) TCM1/2 = constant (d) TCH1/3 = constant
7. Sussceptibility ,
(a) H/M (b) MH (c) H2/M (d)
M/H
8. A
super conducting material exhibits.
(a) Zero resistivity and
complete diamagnetism
(b) Zero conductivity and
complete diamagnetism
(c) Zero resistivity and
complete paramagnetism
(d) Infinite conductivity
and complete peramagnetism
9. At
nanoscale the surface to volume ratio is :
(a) very low (b) very high (c) equal to one (d)
equal to five
10. Armchair, zig-zag and chiral are the classifications of:
(a) Buckyballs (b)
Multiwalled nanotubes
(c) Doublewalled nanotubes (d) Singlewalled nanotubes
[II] Fill in the
Blanks
1. H.T.S.C. stands for ………….
2. SWNT stands for ……………….
3. CVD stands for ……………
4. MWNT stands for ……………
