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Engineering Physics
l;ote: l. A,sw"ran I;IyEIr qu"ntu,\
ylecti
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Phtticat t't:hnlt: t/.to.it
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Ptant's conslut, h=6.625 x
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PART- I
a.
Erplanr
blackbody
mdiation
specrum oD
the
basis
ofllank\
radiadon liw.
(06
)ra.k,
b ObtaiD the soluri.n .lschlodnsers nme
indcpcndent
rale
equatioD
when aDpled b
.
totcnriJl
bu\
ot
rnnnr herehr.
Sd
up
tinE
independent
Schrodin-go
nalc
equBlion
for
fte
particle
in one dimension.
(06llrrli\)
Usin.c
HcieDbnp
s uncertaintrr
pinciple. prove
thar
elecrons
cannot
cxnr
in
a
nucleus.
c
whdt
is
Compron
etlict? lxplain
its
pnrrsical
significancc.
(urv rr,
d
Theposirionandnonentmora.eldctd.lvitheners-vl]5kevarcd.reimnred wlratnthc
minnnum
pe(enragc
unccit.lnty
ln
ns
nDtuertun
ilthe
uDcefrairxy
in
the
nreisureine ol
nsposirion
n0.5Ao.
(BNr,rLn
a.
\\'nat nphase
lelociry
and
Croup
lelociry
in wave
norion?Obtaina
rlarion
betseen
thenr
(06nturlr)
Calcularethe trrvclcne a$ociatedrvnhan
electronhaving1(,E. 100ev.
P.ART-
2
Whar
&e
the
assunDrions nrade in
quantunr
fieeelccto.
nEory'l Eaplainrhe
Wh,t
is
Fermi
level? Dcscribe thc
kriarior
olFerto,
thctorrnh
teolpe.atures.
Exphnr Meissrer.ltci
and rhc
dillcrenr rrles olsuperonducrors.
The
elecrron corccntation
in
a.
n rtpe seni.onducror
r 5
x
loL:hl
curcnt.
calculate drc
co.duciivit)
olnre
tualeiial ilrre
drili
velocity
:150
'n,s
ni,n ele.rn. fipld.r
l0n0 V,m
b
Exphin drc laN
olm $
acrion and
deri\c
thc
conducrivnt
exprsion
ola
c
\\rhat
is
Fcn Dirac satitics?lxphnr
d.
Tne Femilevelln silvcris
i
s
cV
Find
the ve
lo ci ty o a condu.l ion ele.iio.s
a $,hal
n
nrperconductivity?
Explain
supercondnctivityo0 rheba\n
orBCs the.ry
lol2
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8/9/2019 Engineering Physics Jan 2015 - 2014 Scheme
2/2
l:lPHYl2
5
PAR'I'
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a.
Menlioi nre
coMitions lnr
laser
a.tion.
Expbin
thc
LrNcussrhelamNro$h.'osinoprjcarnbrccomn,u.,ca,ioD.
lffI;:[]
Derilc
thecondnion
tbr prcpagaxon
oflishr
rhroueh
anoprical fibre (0,i
r{irkt
The a\emge
powcr
ofa
laser beato ofNavclenglh
6318A is sm\\,.
Find the
number.t
photoDs
emiied
per
second
by
rhe
laser source.
(04
r$kt
Whar
is
Laser?
Gn the coEtruction and worklng
olcarbondio\ide
lascrdevice.
tt0Nrukn
$t
derhe dillercnrrl1)esoropri.alribcm?Explain.
(06M,ik,
Thc
attenustioD in
an
opticaltbre
is 3
6dB/km. whar rmclionolits
innialintensty
rcmaijr
snerlkm?
PART-4
a what
are Miller indiccs?
Explain how
ural interceprs
in
a
crrstat
pla.e
arc conlened
inlo
miller
dices.
(0{
rlrrkt
b Giye
rhc
{orking principle
ofliquid crysral
dispuy. (06Mrrht
c. ri.drhe
atohicFackine
factor
Ib. sC,
FCC
and tsCCsmdurcs
(06
r,r rk,
d Dctemhe rhe
nrterplanar
spaci.g
lbr
(l
l0)
planes
Ib.
copper
whtch
has FCC
stru.rDre
aDd
atonic
FdiLr 012?3nfr
(0lr{,rr )
a.
Obtain
an
eapressn,n for
the
i.terplanardisrsce
in a cubic
crrsrati.
tcms
of
b
Sketch andcvlainrhe
stroctue ol
diamoDd
cry$al,
t
F\pa,IoI
Brdee..rv..\ r.fied'..oBmqe\\J
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o
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thc cxpeilnenrBl
nelhod
otprcdu.ine
nrock
.f
densityofsratcs
wirh
cqualonforl)D.
rD.
c.
Wh8r aatbe pDpniesorcarbon
nanotubesl
what
dre
Shock \ravcs?
E&lain
deasuring
ils Mach
number using
Givc
the
sraphical
represenrallon
a.
whar aE
thc uhralonic
aDd
supeNnn savesl
Describe
in
briet
how
rclationshlps
are
aiiived
b Lxplai.
rhewo&ing
olSEMand
itsapplications
c.
Desc
berhc arcd&halge
ne rdoflroducingcarbonmnotubes
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