KUET 2022 Question Paper M.Sc. Physics

FOR KUET EXAM PREPARATION

KUET 2022
Question Paper · M.Sc.
Physics
EXAM YEAR TYPE SUBJECT

KUET 2022 Question Paper M.Sc. Physics

Notes · Sample Papers · Previous Year Papers · Mock Tests

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ENTRANCE TEST!2022
SCHOOL OF PHYSICAL & MATHEMATICAL SCIENCES

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PHYSICS

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Question Booklet Series I lJ
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Total Questions ; 60 I

Time Allowed :

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Roll No. :

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making entriesin rhe origjnar copx carj^d;oai; at'oi,ta i"iliri tiiin?tii iipi..
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read by lhe OMR Scann-ei and no corirplaint to ihis efecr shall
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Us€. int pen to darken the
po

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geyink pen or pencil should be case
used.

6 Do not darken more than one
circle ofoptions any one
response shall be considered \lrons.

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t who woutd obtain posirive score in Entrance Test Examinarion
shall be eligible
3lY#"r:.ffdtdates

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9. Do not make any stray mark on the OMR sheet.

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10. Calculators and mobiles shall not be permitted inside the

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examination hall.

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11. Rough work, ifany, should be done on the blank sheets provided

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with the question

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it shoutd not be folded and
wll evaiualted. case

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Ens!rc that your OMR Answer Sheet has been signed by the Invigilator
13.
and the candidate himselfl

14. At $e etrd of de-examinbtion. hand over the OMR
Answer Sieet to lhe invigilaror who will hrst tear
o'' oMR sheer in presence of rh. c"rdidar;;;;;;"";;'ii,""c'iliioiii:. 6iiy"ii,.ffi
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l. A given amount of heat cannot be completely 5. Which ofthe following relations
is con6ct wher(
converted into work. However, it is possible to y is specific heat ratio, f is the number of degreer
convert a given amount of work completely into of freedom ?
heat. This statement results from :
(A) y=l+f
(A) Zeroth law of thermodynamics
@) r= 1-r
(B) First law of thermodynamics
(C) Second law of thermodynamics (Q y=r+f
(D) Third law of thermodynamics
.. )
2. Fot a thermodyranic syslern- work done in a given
(D) Y=l+;
'I
process depends upon :
6. The thermodynamical potential, enthalpy is
(A) The path H = U + pY wherc U is tlle intemal energy, p the
(B) State of the system pressure and V is the volume. Then :

(C) Extemal pressure
(A)
f aH)
r=-lasJ" -dv=[anJ.
f aH)
(D) Nature ofthe system
3. In a reftigerator, the heat exhausted to the outer
(B) r=
f aH) f as)
atrnosphere is :
las]v -ou=[+ ,,.
(A) Less than that absorbed fiom the contents of
<"r ,=-[ff), *dv=(#)"
the refrigerator

(B) Same as that absorbed from the contents

(c) More than that abso$ed fiom the contenrs
(D) Any of the above depending upon the
r, '-(#), -."=(#)"
working substance 7. A fluid at high presswe is throttled thrcugh a
4. The intemal energy ofa perfect monoatomic gas nafow porous opening in a tegion of lower
at27'C is : pressure without any tlansfer of heat. In such
a
process :
(A) Only kinetic
(B) Only potential (A) The entropy does not change
(B) The Gibbs ftee energy rcmains consrant
(C) Partly kinetic and potential
(C) . The enhopy is decreased
(D) Only vibrational
@) The enthalpy ofthe fluid is/constanr r

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ag
Under equilibriurn conditions, thelhemodlnamic r 12. According
to the Fermi-Di.ac statistics the number
variable associated with the black body radiation ofpalicles in a phase cell can be .
at temperature T u'hich rcduces to zero is : (A) Any number
(A) Entropy (B) Only two
(B) Helrnholtz free energy (C) Only three

m
(D) Onty one
o
(C) Gibbs free energy

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13. Two tuning forks A and B of nea.ly equal

.c emitfed black em
@) Pressure
to produce Lissajous figures. On slightlysloading
liequencies

em000K peaks in the region body
employed in
are optical experiment
an

s lachaoge of
fork A, it is observed that the cyclegof
9. The spectrum ofradiation

la of frequencies
by a
at a

g
temperatue i
a
a
:

(A) Visible range
figure slows down from 10 to 20 seconds. Ifthe
ftequency of fork B is 256 Hz, the Sequency
(B) Infiared range of fiequencies of
fork A after loading is :
(C) Ultraviolet range of frequencies
(A) 256.05 Hz
@) Microwave range of frequencies @) 200.05 Hz
10. The avemge value of velocity v in
Maxwellian
(C) 1s6.0s Hz
(D) 100.05 Hz
m
distribution ofspeeds is :

c. o displacement ofparticles is given by r{(x, =
14. A plane wave traverses a medium, the
(A) Zerc

s em sin(47r1 0.02rx), (V
D 0.01

a
l

l
(B)
t
g
and x are measured
in mete$

a
and seconds), then the amplitude and wavelenglh
ofthe wave are rcspectively :
(c) KT
-m (A) 0.01 m and 100 m
(B) 0.01 s and 100 In
nr
(D)./:
vm
(C) 0.01 m and 100 s
(D) l m and 100m
ll. The m€n translational kinetic energy per molecule 15. At object ofmass 2 kg hangs ftom a spring of
m
c. o
ofan ideal gas is : negligiblemass. The spring is extended

m
by 2.5 cm

c. o I m
(A) kr when the object is attached. The top end

e
of the

em (B) tkr la s
spring is oscillating up and down in SHM
with an

las ag
amplitude of 2 n]m. If g = l Omsr, then the
angular

ag
frequency ofthe oscillations is :

(c)
3 (A) 200 rad s
'
2-' (B) 20 rad s
'
2
(C) 10 rad sr
@) - (D) 100 rad s-l

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Page 3 of 10

16. The fringe width in terms of wavelength (L), 19. Consider two waves passing tbrough the same
distance between the slits and screen (D) and string. Principle of superposition for displacement
distance of separation of slits (d) is : says that the net displacement of a particle on the
string is the sum of the displacements produced
?d
(A) D by the two waves individually. Suppose we state
the similar principle for the net velocity and t}Ie
?",D net kinetic energy ofthe particle. Such a principle
(B)d
will be valid for :
(A) Both the velocity ard the kinetio energy
(c).ID,
d (B) The velocity but not for fie kinetic energy

(D) ?,D
d
(C) The kinetic energy but not the velocity
(D) Neither the velocity nor the kinetic €aeryy
t7. In a double slit interference experiment, one of
20' The positions of the principal maxima are given
the slits is covered by thin mica sheet rhor"
by gating equation :
refiactive index is 1.58. The distance d = 0.1 cm
and D = 50 cm. Due to inlroduction of mic4 the (A) d'sin0 = mL, m = 0,1,2,....
central fiinge gets shifted by 0.2 cm. The thickness
(B) X, sine = md, m= 0,1,2,....
of mica sheet is :
(C) dsin'z 0 =nt?l,, m = 0,1,2,....
(A) 6.7x104 cm
(D) dsin0 = ml., m = 0,1,2,....
(B) 2.2xl0r cm
(C) 1.1x10rcm 21' The de-Brogile wavelength of a particle with
charge q and mass m is accelerated through a
(D) 0.1x10r cm
potential difference V is :
18. Monochromatic light of wavelength 600 nm is
h
used in a Young's double slit experiment. One of (A) 1"=
the slits is covered by a transparent sheet of {mqv
thickness 1.8xl0r m nade up of material of
hm
refiactive index 1.6. The number of fiinges that (B) r=
{qv
shift due to introduction of sheet is :
(A) 6 h
(q r= {zmqv
(B) 12
(c) 18 (D) ?'=0
(D) 20
'a

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as 22. Ar elector ard aproton each having ag
en eryy 5 eV 26. The magnitude
are incident on a bauier of 10 the angular momentum due
eV high and to

- I is-'.
I angsuom wide. The corect statement electron spin for soin
(A) The electron will have greater uansmission
is : ' 2
probability
.A
(B) The proton will have greater rransmission (A);h
m
co
probability

o m
(C) Both electon and proton have
m .
.c ril f*
e
the same

(D) None ofthemmpenetate a s
tansmission probability

e l
2

l s
a the following is correcr rn respect
potential
the

a g
g
23. Which one of
a and a proton havlng the
(c) ^t;
of an electron
same
;h,
de-Broglie wavelength of2
angshom ?
(A) Both have same kinetic energ' .A
(D) :h
(B) The kinetic energy ofthe proton
rs more than
that ofthe electron 27. The maximum number ofelectrons
a shell can hold
(C) Both have the same velocity is (n is a principal quantum

m
number) :

o
(D) Both have the same momentuur
hydrogen atom is . c (A) 4n,
m (B) 2n,
24. The energy of nii level ofthe

s e
l a
propodronal to :

ag
(A) n (c) (2n+1)'
@) n'
(D) 2n+1
1
(c)
;, 28. The number N ofundecayed nuclei
at the time t in
telms of the decay prcbability
(D)f
., per unit time )- of
n the nuclide involved and the
number
\ of
m
25. A sample of a certain element undecayed nuclei at t = 0

c. o
is placed in a is :

om
0-300-T magnetic field and

c.4)u-nrn m
suitably excited. (A) N = Nos+,

s e
H-ow far apat are the ZeemaD

em (A) 0.00283 Dm la
componenls ol.lhe

s
(B) N=N ert

ag
speclral line ofthis element

la (B) 0.0283 lun
?

g
(c) N = \e-&'?
a (C) 0.283 nrn (D) N = \e^,'?
@) No Zeeman effect takes place

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29. The coordination number in case of simple cubic 34 The Fermi level of an int nsic semiconductor is

stluctlue is : pinned at the center of the band gap. The
(A) 12 probability of occupation of the highest electron
(B) 6 state in valenae band at room tempemlwe will
(c) 2 be:
(D) I (A) Zero
30. Electronic contribution to specific heat ofmetals
at low temperatue is proportional to : I
(B) ;
(e) ri
(B) T' I
(c) r] \"] 2
(D) T' (D) Infinity
31. The valence electrons do not diectly determine
the following property ofthe metal : 35- The avalanche breakdown in a pn-junction is due

(A) Electrical conductivity to:
(B) Thermalconductivity (A) Shift of Fermi level
(C) Shear modulus
(D) Metallic luste (B) Cumulative effect of conduction band
electron collisions
32. Electdcal conductivity of a metal in terms of
mass (m), charge (e); concentration (n) and (C) Widening of forbidden gaP
relaxation time (t) of electron is :
(A) rurel @) None of the above

(B)
mne 36. The depletion layer in a pn-junction diode consists
,| of layers of :
-
,
^. ne't (A) Positively charged donors on the p-side and
m negatively charged acceptors on the n-side

netr' (B) Negatively charged donors on the p-side and
(D)
m positively charged acceptors on the n-side
-
33. The impurity atoms with which pure silicon should
(C) Positively charged dono$ on the n-side and
b9 doped to make a p-t)?g semiconductor are :
negatively charged acceptors on the p-side
(A) Phosphorus and boron
(B) Boron and aluminium (D) Negatively chaxged donors on tlte p-side and
(C) Boron and antimonY positively charged acceptors on the n-side
(D) Anlimony and aluminium

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as 37. If a transistor amplifier has a gain of 20dB, then ag
The principle ofrelativiry states :
the ratio of output to input power is :
(A) The Laws of Physics are same for any rwo
(A) 100 non-inertial observers
(B) 10
(B) The Laws ofPhysics are not same for inertial
(c) 20 observers
(D) 200
m
(C) The Laws ofPhysics are same for all inertial

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38. The DC load line of an amplifier circuit : observers in uniform motion relative to each

.c e m
s
(A) Has a positive slope other

e m l a
s g
(B) Has a curvatwe
a
(D) No relativity exists
l a
ag
(C) Does not contain the Q-point 43. A paxticle ofmass m released fiom a height h falls
(D) Has a negative slope under gravity. Assuming that the resistance offercd
39. An increase in diode voltage leads to : by air is mkv,, where k is a constant, v the velocity
(A) Incrcase in diode resistance ofparticle. The teminal speed ofthe paticle is :

@) Dectease in diode rcsistance
(C) No change in diode resistance (A) ;

m(B)
(D) Increase or decrease depending on the nature

c o
40. Ajunction freld efect tansistor behaves i m.
ofdiode
.F
(A) Voltage conholled crment source as
e as

l
ag
(c)
^,G[
(B) Voltage contoolled voltage source
(C) Cuqent controlled voltage source (D)
(D) Cuaent controlled cufient source
'E energy of a particle continuously
41. A body of charge q starts from rest and a"qui."s a 44. The kinetic
velocity v = 0.5c. The new charge of the body increases with time, then :
is: (A) The resultant force on the particle must be
m
m c. o
parallel to the velocity at all times

c. o {r-(u.))-
q

e m
(B) The angle berween force and velociry is acure

em (B) q la s
s
all the time

la ag
(C) Its height above the ground continuously

ag (c) q 1-(o.s)3 lncleases
(D) The angle berween force and velocilv iq qoo
(D) q always

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move towards ei
45. A sphere of radius r and mass m rolls without 48' Two particles initially at rest,
slipping on a surface with speed v. The ratio of other under a mutual force of athaction. If at

translational kinetic energy aJd rotational kinetic instant, tie speed of one particle is v and spee(

energy is : the other particle is 2v, tien the speed oftle cer
ofmass oflhe system is :
1
(A) -5 (A) Zerc

z tB)
(B)
5
(c) l.5v
I
(c)
t (D) 3v

49. The electric field inlensity on the surface

@)
I 8
charg€d conductor is :

46. ln the case of geostationary satellite, the : (A) Zero

(A) Rotation ofthe earth and rcvolution of t]Ie (B) Directed nomally to the sruface
satellite will be in the same direction
(C) Dirccted tangentially to tlle surfape
(B) Rotation of the earth and revolution ofthe
satellite will be in the opposite dircction
(D) Dirccted at 45o to the surface

(C) Angular velocity of the earth's rotation and 50. For a particle executing simple hannonic mi
angular velocity of revolution of the salellite then :
will be equal and in the same direclion
(A) Time average of the total energy is p
(D) Angular velocity of the eath's rotation and kinetic energY
angularvelocity of revolution of the satellite
will be different and in the opposite dircction @) Time average of the total e[ergy is f
potential energy
47. When a satellite moves around the earth, the
quantitY which remains c,onstant :
(C) Time average ofpotential energy is sa
time average of kinetic energY
(A) Angular velocitY
(D) Time avemge ofpotential energy is nol
(B) Kinetic energY
as time average ofkinetic energy
(C) Potential energY
(D) Areal velocitY

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as 51. A sphere ofradius R has a charge density p which
54.
ag
If magnetic field E = V x A, A being the vector
varies with distance as p
= qrf,c is a constant. potential, then for constant magnetic field
we
The electric field at a distance r < R vaies with r have :
as:
l/- -\
-l (A) A- =:lBxA
' 2',I
'

m
(B) E
om ' A=:lBxil
fB)
. co
.c e m
"..u6 2'
(C) Eo.tl
e m l a s
s
.^. - /-
g
(uj
a
A=(Bxi/xi
@) Eart'
A charge q g l a
r{,
a sits at one ofthe comers ofa cube of
side The flux through one side ofthis
a"
(D) 0
cube is : 55. A hollow sphere ofrcdius
R has a charge +q on rts
(A) Zerc surface. Ifthe charge on the sphere is doubled
and
q its radius is halved, the energy associated with
the
electric field :

(A) Increases eight times

omInoeases fow times
q
(c) ;-
c. (B)
s em (C) Remains same
a
o

l
(D) .-

53. Two large qetal plates each of area a g (D) Decreases four times
A are held a
56. r:'recrJtc Uetd ustde a conduclor carD/ing
small distance d apart. The electric field is surface
:
charge density o is :
(A) Zero everywhere
(A) Zao
(lj.) t = 0 between the plates aad E , ;- ourside
(B)-o
m
c. o
the plates

m
c. o (c) t:0 outside the plares and E = o
s e m
em |tepldes la
- between
las ag
ag (' F
(D) = :- ev€rywhere
E (D)
!;

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57. In an electromagnetic wave, the direction of the 59. The vector potential in a region
is given as
magnetic field is : [ = -yi + zxj. The associated magnetic freld B
is:
(A) Palallel to the electric field
(e) i+t
(B) Perpendicular to the electric field
(e) :[
(C) Completely random
(c) -i+zj
(D) Antipaxallel to the Po]'rxting vector
@) -i+i+t
58. A ftee elechon is placed in the path of a plane .^
ou' If charge on a parallel plate capacitor is
electromagnetic wave. The elecrron will start
current is :
q=
% sin ot, then the displacement
movlng :
(A) o)% cos o)t
(A) Along the electdc field
q"
(B) - cos tot
@) Along the direction ofmagnetic field
(C) Along the direction ofpropagation ofwave q"
(C) -: cos ot
o
@) Cannot move at all
@) --o% cos ot

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