Old Exam Papers Dec. 2010 - Video

for it. The atomic weight of copper is 63.54 and density
is 8.9 ? 10 3 kg/m 3 . 3
rk¡cs dh fØLVyh; lajpuk esa tkyd fu;rkad 3.62Å gS]
blds izfr ,dd dksf"Bdk esa ijek.kqvksa dh la[;k Kkr
dhft;sA rk¡cs dk ijek.kq Hkkj 63.54 rFkk ?kuRo
8.9 ? 10 3 fdxzk@eh 3 gSA 3
2. (a) Find reciprocal lattice and Brillouin zone for simple
cubic and body centred cubic lattice. 7
ljy ?kuh; o vUr dsfUnzr ?kuh; lajpuk ds fy, O;qRØe
tkyd o fczyqoka {ks= Kkr dhft;sA 7
(b) Define cohesive energy for ionic crystal. 3
vk;fud fØLVy ds fy, llatd ÅtkZ dks ifjHkkf"kr
dhft;sA 3
3. Explain Frenkel defect in a crystal. For a crystal establish a
formula for the concentration present in this defect. 3+7
fØLVy esa ÝsUdy nks"k dks le>kb;sA fØLVy eas mifLFkr bu
nks"kksa dh lkUnzrk ds fy, lw= LFkkfir dhft;sA 3+7
4. (a) Describe rotating method for the determination of
crystal structure. 7
600 2 PH-10
Papers (A) (December) 2010
(600)
izfrpqEcdh;] vuqpqEcdh; rFkk ykSg&pqEcdh; inkFkksZa dks
mnkgj.k lfgr le>kb;sA D;wjh ds fu;e dks fyf[k;s
rFkk D;wjh rki dks ifjHkkf"kr dhft;sA 6
(b) Explain photovoltaic effect. 4
izdk'k oksYVh; izHkko dks le>kb;sA 4
10. (a) What is critical magnetic field ? Explain the
classification of superconductors on the basis of
it. 2+3
ØkfUrd pqEcdh; {ks= D;k gS \ blds vk/kkj ij vfrpkydksa
dk oxhZdj.k le>kb;sA 2+3
(b) Explain the thermodynamical effects related to
superconducting transition. 5
vfrpkyd laØe.k ls lEc) Å"ekxfrd izHkkoksa dks
le>kb;sA 5
PH-10 5 600