HPSC Polytechnic Lecturer 2022: Lecturer (Technical Education) Screening Test, Applied Science (Physics) (Advt. No. 11/2021)
Text of page 1
DO NOT OPEN THE SEAL UNTIL INSTRUCTED TO DO SO
Question Booklet No.
QUESTION BOOKLET
APPLIED SCIENCE
( PHYSICS ) Booklet Series
A
Roll No.
(Enter your Roll number in the above space)
Time Allowed : 2 Hours Maximum Marks : 100
INSTRUCTIONS FOR CANDIDATES
1. IMMEDIATELY AFTER THE COMMENCEMENT OF THE EXAMINATION, YOU SHOULD CHECK THAT
THIS QUESTION BOOKLET DOES NOT HAVE ANY UNPRINTED OR TORN OR MISSING PAGES OR
QUESTIONS ETC. IF SO, GET IT REPLACED BY A COMPLETE QUESTION BOOKLET.
2. Please note that it is the candidate’s responsibility to encode and fill in the Roll Number and
Question Booklet Series Code A, B, C or D carefully and without any omission or discrepancy at
the appropriate places in the OMR Answer Sheet. Any omission/discrepancy will render the
OMR Answer Sheet liable for rejection.
3. This Question Booklet contains 100 questions. Each question is printed in English only. Each
question comprises four responses (answers). You will select the response which you want to
mark on the OMR Answer Sheet. In case you feel that there is more than one correct response,
mark the response which you consider the best. In any case, choose ONLY ONE response for
each question.
4. You have to mark all your responses ONLY on the separate OMR Answer Sheet provided. See
Instructions at the backside of the OMR Answer Sheet.
5. All questions carry equal marks.
6. Before you proceed to mark in the OMR Answer Sheet the response to various questions in the
Question Booklet, you have to fill in some particulars in the OMR Answer Sheet as per
instructions mentioned on the OMR Answer Sheet.
7. After you have completed filling in all your responses on the OMR Answer Sheet and the
examination has concluded, you should hand over to the Invigilator only the OMR Answer
Sheet. You are permitted to take away with you the Question Booklet, along with candidate’s
copy of OMR Answer Sheet.
8. Sheets for rough work are appended in the Question Booklet at the end.
9. Penalty for wrong answers :
THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE AS UNDER.
(i) There are four alternatives for the answer to every question. For each question for which
a wrong answer has been given by the candidate, 0.25 mark assigned to that question will
be deducted as penalty.
(ii) If a candidate gives more than one answer, it will be treated as a wrong answer even if one
of the given answers happens to be correct and there will be same penalty as above to that
question.
(iii) If a question is left blank, i.e., no answer is given by the candidate, there will be no penalty
for that question.
DO NOT OPEN THE SEAL UNTIL INSTRUCTED TO DO SO
Applied Science ( Physics ) /19- A
Text of page 2
1. A system exhibits invariance 5. The number of photons emitted per
under translation in space and second by a 100 W source of
time. Which of the following monochromatic light of wavelength
quantities will remain conserved? 5893 Å is
[A] Linear momentum and angular [A] 2·96 × 1020
momentum
[B] Angular momentum and [B] 2·96 × 1024
energy [C] 8·24 × 1024
[C] Linear momentum and energy
[D] 8·24 × 1020
[D] Linear momentum, angular
momentum and energy
6. Assume that the uncertainty in
2. If the Lagrangian of a system has the location of the particle is equal
only one term which has a linear to its de Broglie wavelength. The
dependence on velocity, then its uncertainty in the measurement
Hamiltonian of velocity v of the particle is
[A] also has only one term [A] v /2
depending on velocity
[B] is zero [B] v / 4
[C] is not defined
[C] v /
[D] is constant and independent of
velocity [D] v / 8
3. Although mass-energy equivalence
of special relativity allows 7. A proton is confined to a nucleus of
conversion of photon to an radius 5 × 10–15 m. The minimum
electron-positron pair, such a value of the kinetic energy of the
process cannot occur in free space proton is
because
[A] 46 keV
[A] the mass is not conserved
[B] 54 keV
[B] the energy is not conserved
[C] the momentum is not [C] 74 keV
conserved
[D] 82 keV
[D] the charge is not conserved
8. Which of the following bonds will
4. An electron is accelerated from have directional character?
rest by 10·2 million volts. The
percent increase in its mass is [A] Ionic
[A] 20000
[B] Covalent
[B] 2000
[C] Metallic
[C] 200
[D] 20 [D] van der Waals
Applied Science ( Physics )/19- A 2
Text of page 3
9. The critical magnetic field for a 13. A charge q moves in a combined
solid in superconducting state electric field E and magnetic
induction B. Then, as the charge
[A] is independent on temperature moves
[B] rises with temperature
[A] both the electric field and
[C] increases if temperature
magnetic induction work on it
decreases
[D] does not depend on the [B] electric field does work
transition temperature magnetic induction doesn’t
10. N-type silicon is obtained by doping [C] magnetic induction works
silicon with electric field doesn’t
[A] germanium
[D] neither of them work
[B] aluminium
[C] boron
[D] phosphorus 14. The electric field due to a charge q
is given by E = q/r 2 along outward
radial direction. The value of the
11. For a perfect free-electron gas in a
closed surface integral of electric
metal, the magnitudes of phase
field depends only on
velocity and group velocity are
such that
[A] area of surface
[A] V p Vg
[B] radial distance r
[B] V p Vg /2
[C] charge
1/2
[C] V p 2 Vg
[D] shape of the surface
[D] V p 2Vg
12. Three point charges q, q and –2q are 15. The vector potential of a moving
located at (0, –a, a), (0, a, a) and charge depends upon
(0, 0, –a) respectively. The net dipole
moment of this charge distribution
is [A] velocity only
[A] 4qa along z-axis [B] charge only
[B] 2qa along z-axis
[C] momentum only
[C] –4qa along x-axis
[D] –2qa along y-axis [D] velocity and charge
Applied Science ( Physics ) /19- A 3 [ P.T.O.
Text of page 4
16. Which of the following statements 19. If the wavelength of the first line of
is correct in relation to the the Balmer series in the hydrogen
distribution functions in statistical spectrum is , then the
mechanics? wavelength of the first line of the
[A] In the high temperature limit, Lyman series is
the Boltzmann distribution [A] (27/5)
function will be very different
from the Bose and Fermi [B] (5/27)
distribution functions [C] (32/27)
[B] Bose and Boltzmann [D] (27/32)
distribution functions are the
same at high temperature but
differ from Fermi distribution 20. The hyperfine splitting of the
function spectral lines of an atom is due to
the
[C] In the high temperature limit,
Bose and Fermi distribution [A] coupling between the spins of
functions approach the two or more electrons
Boltzmann distribution [B] coupling between the spins
function and the orbital angular
[D] Both statements [A] and [C] momenta of the electron
are wrong
[C] coupling between the electron
spins and the nuclear spin
17. Consider C atom (mass
number = 12). Which of the [D] effects of external
following is true for atom? electromagnetic field
[A] It will follow classical
statistics 21. In the Zeeman effect, the light
[B] It will follow Fermi-Dirac emitted along and perpendicular to
statistics the applied magnetic field are
[C] It will follow Bose-Einstein [A] respectively linearly and
statistics circularly polarized
[D] None of the above [B] respectively circularly and
linearly polarized
18. In a Stern-Gerlach experiment,
[C] both linearly polarized
the atomic beam whose angular
momentum state is to be [D] both circularly polarized
determined, must travel through
[A] homogeneous radio frequency 22. Which one of the following would
magnetic field not cause the broadening in
[B] homogeneous static magnetic spectral lines?
field [A] Doppler effect
[C] inhomogeneous static magnetic
[B] Heisenberg’s uncertainty
field
[D] inhomogeneous radio frequency [C] Absorption of EM radiations
magnetic field [D] Collisions
Applied Science ( Physics )/19- A 4
Text of page 5
23. Moving clock loses 1 minute in each 26. Velocity of light in a medium, for
hour. The speed of the clock is which relative permittivity and
relative permeability are 3 and 2
[A] 5·4 × 107 ms–1 respectively, is
[B] 2·7 × 107 ms–1 3
[A] 108 m/s
2
[C] 5·4 × 108 ms–1
3
[B] 108 m/s
[D] 2·7 × 108 ms–1 4
3
[C] 108 m/s
2
24. Consider a potential of the form [D] 2 108 m/s
– r
U (r ) K er . If the particle of mass
27. A plane electromagnetic wave
m moves in a circular path, its 8
period is E 100 cos ( 6 10 t 4x ) V/m
propagates in a medium of
– r
[A] 2 Ke dielectric constant
mr 3
[A] 1·5
1/2
Ke – r
[B] 2·0
3
[B] 2 1 r
mr [C] 2·4
[D] 4·0
1/2
Ke – r
3
[C] 2 1 r
mr 28. If 3 cos e i , then the
Ke – r commutator , is
[D] 2 3
1 r
mr
[A] i 6 sin e i
[B] i 6 sin e i
25. The Hamiltonian corresponding to [C] i 3 sin e i
1 2 1 2 2 [D] zero
Lagrangian x – x – x 3 xx 2b
2 2
is 29. A particle constrained to move along
the x-axis is described by the wave-
p2 1 function
[A] H – 2 x 2 x 3
2 1 2x 2 (x ) 2x ; 0 x 1
p2 1 0; elsewhere.
[B] H 2 x 2 x 3
2 1 2x 2 What is the probability of finding
the particle within the interval
p2 1 2 3 (0, 0·4)?
[C] H x x 2
2 1 2x
2
2 [A] 0·8
[B] 0·08
p2 1
[D] H 2 x x 3 [C] 0·008
2 1 2x 2 2
[D] 0·0008
Applied Science ( Physics ) /19- A 5 [ P.T.O.
Text of page 6
30. Which of the following is correct 34. The numbers of accessible
set of eigenvalues of the Hermitian states per unit energy are given
3
2 i
matrix ? by 2V (2m ) 2 x (for non-
i 2 g ()
h3
[A] 2, 2 4V y
relativistic gas) and g ( )
[B] 1, –i h 3c 3
(for massless or relativistic gas).
[C] 1, 3 Then x and y will be
[D] 1, 0 [A] x ½, y ½
31. An ensemble of N three-level systems [B] x ½, y 0
with energies = –0, 0, + 0 is in [C] x ½, y 2
thermal equilibrium at
temperature T. Let (kBT )1. If [D] x ½, y 1
= 2, the probability of finding the
system in the level = 0 is 35. The selection rule for Paschen-Back
cosh x effect is
[A]
2
[A] ( M L 2M S ) 0, 1
1
[B] (cosh x )
[B] ( M L 2M S ) 0, 1
[C] (2cosh x )1
1 [C] ( M L M S ) 0, 1
[D] (1 2cosh x )
[D] ( 2M L 2M S ) 0, 1
32. A system containing 10
distinguishable spin –1/2 particles
36. In Stark effect M J 0 gives
is kept in a magnetic field B . The
system has an energy –2BB. The [A] -component
distinct possible configurations are
[B] -component
[A] 210
[C] both - and -components
[B] 720
[C] 1024 [D] None of the above
[D] 10
37. The first Stokes line of a rotational
Raman Spectra is observed at
33. A black body is at temperature of 12·96 cm–1. Considering the rigid
527 °C. To radiate twice as much rotor approximation, the rotational
energy per second, its temperature constant is given by
must be increased to the value of
[A] 6·48 cm–1
[A] 1600 K
[B] 951 K [B] 3·24 cm–1
[C] 200 K [C] 2·16 cm–1
[D] 12800 K [D] 1·62 cm–1
Applied Science ( Physics )/19- A 6
Text of page 7
38. In a simple cubic lattice 41. In a band structure calculation, the
d100 : d110 : d111 is dispersion relation for electrons is
found to be
[A] 6 : 3 : 2 Ek (cos k x a cos kya cos k z a )
where is constant and a is lattice
[B] 6 : 3 : 2 constant. The effective mass at the
boundary of the first Brillouin zone
[C] 6: 3: 2 is
22
[D] 6: 3: 4 [A]
5 a 2
42
[B]
39. A superconducting ring is cooled in 5 a 2
the presence of a magnetic field
2
below its critical temperature (Tc ). [C]
The total magnetic flux that passes 2 a 2
through the ring is 2
[D]
3 a 2
[A] zero
42. If p and q are the position and
h
[B] n momentum variables, which one
2e of the following is not canonical
transformation?
nh
[C] 4 e
[A] Q q and P p , for 0
ne 2 [B] Q q p and P q p , for
[D] , real and 2 2 1
hc
[C] Q p and P q
[D] Q p and P q
40. Calculate mobility of electrons in
copper, if number of electrons per
unit volume is 9 × 1028 and 43. A space station moving in a
conductivity of copper is circular orbit around the earth
6 × 107 (m–1). goes into a new bound orbit by
firing its engine radially outwards.
[A] 5 × 10–3 m/V·s The orbit is
[A] large circle
[B] 4 × 10–3 m/V·s
[B] smaller circle
–3
[C] 4·16 × 10 m/V·s
[C] an ellipse
[D] 5·16 × 10–3 m/V·s [D] a parabola
Applied Science ( Physics ) /19- A 7 [ P.T.O.
Text of page 8
44. A hoop is pivoted at a point on 48. A wire carrying a current of 2 A is
circumference. The period of small bent into the shape of a two semi-
oscillations in the plane of loop is circles, one with a radius 1 m and
2R the other with radius 2 m. The two
[A] 2 g
semi-circles are connected at
their ends, that is along the two
R radii. The magnetic field at the
[B] 2 4g centre of the semi-circles is
R [A] 10–7 T
[C] 2 g
[B] 16 × 10–7 T
9R
[D] 2 7g [C] 2 × 10–7 T
[D] 3 × 10–7 T
45. The mass m of a moving particle is
2m 0 49. A sphere of radius R carries
, where m0 is rest mass. The
3 polarization P (r ) kr , where k is
linear momentum of the particle is
constant and r is vector from centre.
[A] 2m 0C What would be the volume bound
2m 0 charge density of the sphere?
[B]
3
m 0C [A] 3k r 2
[C]
3 [B] –3k
[D] m 0C
[C] k r 2
46. If, in a Kepler potential, the k 4
[D] r
pericentre distance of particle in a 4
parabolic orbit is r p while the
radius of the circular orbit with 50. If a charged particle of charge q
the same angular momentum is and mass m moving with speed v
rc , then enters a magnetic field B
[A] r p rc /2 perpendicular to its direction of
motion, it will move in a circular
[B] rc r p
orbit of radius R. Then,
[C] 2rc r p
[A] R is directly proportional to
[D] rc 2 rp
q/m and |B|
47. The electric field of a travelling wave [B] R is inversely proportional to
is given by E 100cos(109 t 4x ) , q/m and |B|
where t is in seconds and x in [C] R is directly proportional to
metres. The speed of the wave is q/m and inversely proportional
[A] 3·0 × 108 m/s to |B|
[B] 2·5 × 108 m/s
[D] R is inversely proportional to
[C] 3·0 × 107 m/s q/m and directly proportional
[D] 5·0 × 107 m/s to |B|
Applied Science ( Physics )/19- A 8
Text of page 9
51. A cube has a constant electric 55. A fermion of mass m moving in two-
potential V on its surface. If there dimensions is strictly confined
are no charges inside the cube, inside a square box of side l. The
the potential at the centre of the potential inside is zero. A
cube is measurement of the energy of the
2 2
[A] V fermion yields the result E 65 2 .
2ml
[B] V/8 The degeneracy of this energy
[C] 0 state is
[D] V/6 [A] 2
52. The wavelength of red helium- [B] 4
neon laser in air is 6328 Å. What
[C] 8
happens to its frequency in glass
that has a refractive index of 1·50?
[D] 16
[A] Increases by a factor of 3
[B] Decreases by a factor of 1·5
d
56. The momentum operator –i acts
[C] Remains the same dx
on a wave function (x ) . This
[D] Decreases by a factor of 0·5 operator is Hermitian
53. A particle of mass m is confined in [A] provided the wave function
a 3-D box of edges a, 2a and 2a. The (x ) in normalized
potential inside the box is zero and
infinite outside. The energy of first [B] provided the wave function
excited level is (x ) and derivative (x ) are
continuous everywhere
3h 2
[A] 4 ma 2
[C] provided the wave function
3h 2 (x ) vanishes as x
[B] 16 ma 2
[D] by its very definition
9h 2
[C] 32 ma 2
57. The energy of the system of 19
17h 2
[D] 32 ma 2 electrons in 3-D isotropic harmonic
oscillator potential is
54. Pauli spin matrices satisfy [A] 3
[A] i
[B] 57·5
[B] 2i
[C] 56·52
[C]
[D] 2 [D] 9·5
Applied Science ( Physics ) /19- A 9 [ P.T.O.
Text of page 10
58. A random walker takes a step of unit 61. At temperature _____, the r.m.s.
length in the positive X direction speed of gaseous hydrogen
2 molecules is equal to that of
with probability and a step of unit
3 oxygen molecules at 47 °C.
length in negative X direction with
1 [A] –253 °C
probability . The mean
3 [B] –289 °C
displacement of walker after n steps
is [C] –324 °C
[A] 0 [D] –198 °C
[B] n
n 62. Consider the transition of liquid
[C]
9 water to steam as it boils at 100 °C
n under the pressure of 1 atm. Which
[D]
3 of the following quantities does not
discontinue at the transition?
59. A box of volume V containing N
molecules of an ideal gas is divided [A] Gibbs free energy
by a wall with a hole into two [B] The internal energy
compartments. If the volume of
v [C] The entropy
smaller compartment is , then
3 [D] The specific heat
find the variance of number of
particles present in it.
63. Given that the ground state energy
2
[A] N of Hydrogen atom is –13·6 eV, then
9
the ground state energy of
N
[B] positronium (which is a bound
4 state of an electron and a positron)
[C] N is
N [A] 6·8 eV
[D]
3
[B] –6·8 eV
60. In an assembly of N non-interacting [C] –13·6 eV
particles in equilibrium at
temperature T, each of the particles [D] 13·6 eV
can be in any of the three non-
degenerate energy levels with 64. Which of the following transitions
energies 0, KBT and 2KBT. If the is not allowed in case of an atom
mean energy is 100 KBT, find N. according to the electric dipole
Assume that particles are identical radiation selection rule?
but distinguishable. [A] 2s-1s
[A] 130
[B] 2p-1s
[B] 290
[C] 236 [C] 2p-2s
[D] 480 [D] 3d-2p
Applied Science ( Physics )/19- A 10
Text of page 11
65. A crystal system whose unit 69. Evaluate the following integral,
cell is specified by a b c , where C is the unit circle and
centre is around |z|=0, using
a 90 is known as
Cauchy’s residue theorem :
[A] monoclinic 4z 3 8
c 4z dz
[B] rhombohedral
[C] tetragonal 3
[A] i (6 – )
32
[D] orthorhombic
3
66. A plane in a cubic lattice makes [B] 2i (6 – )
32
intercepts of a, a/2 and 2a/3 with
the three crystallographic axes 3
respectively. The Miller indices for [C] i (4 – )
32
this plane are
[A] (2 4 3) 3
[D] i (4 – )
64
[B] (3 4 2)
[C] (6 3 4)
[D] (1 2 3) 70. The ordinary differential equation
(1 – X 2 )y – Xy 9Y 0 has a regular
singularity at
67. Cooper pair forms when two
[A] phonons interact with an [A] –1 and +1
electron
[B] electrons interact with a [B] 0
phonon
[C] 2
[C] polarons interact with an
electron
[D] No finite value of X
[D] electrons interact with an
polaron
71. The ideal Op-amp with input
68. Consider a two-dimensional crystal
resistance Ri , output resistance Ro
with 3 atoms in the basis. The
and gain A has
number of allowed optical branches
(n) and acoustic branches (m) due
to lattice vibrations are [A] Ri , A , Ro 0
[A] (n , m ) (2, 4) [B] Ri 0, A , Ro 0
[B] (n , m ) (3, 3)
[C] Ri , A , Ro
[C] (n , m ) (4, 2)
[D] (n , m ) (1, 5) [D] Ri 0, A , Ro
Applied Science ( Physics ) /19- A 11 [ P.T.O.
Text of page 12
72. An amplifier with negative 76. The characteristic equation
feedback has a voltage gain of 100. | A I | 0 is 3 22 – 3 4 0.
It is found that with feedback an The characteristic equation for A–1
input signal of 0·6 V is required to is
produce a given output whereas
without feedback the input signal
[A] 3 – 2 2 3 – 4 0
must be only 50 mV for the same
output. Then the voltage gain
1 2 1 1
[B] 0
3
without feedback A and feedback
factor are 2 3 4
9 3
[A] A 1000, 3 2
[C] – – –20
1000 2
10
[B] A 1100, 3 2 1 1
1100 3
[D] – 0
13 4 2 4
[C] A 1400,
2000
11
[D] A 1200,
1200 77. Find the nature and location of
1
73. Reduce AB ABC AB ABC using singular point of (z 1)sin .
z – 2
law’s of Boolean algebra.
[A] A + BC [A] Essential singularity at z = 2
[B] B + AC
[B] Removable singularity at z = 2
[C] C + AB
[D] A + B + C [C] Essential singularity z = –1
74. If particle X has isospin I = (3/2), [D] Removable singularity z = –1
Baryon number B = 1 and
strangeness number S = 0, then
the possible values of electric
78. The points, where the series
charges of particle X are
solution of the Legendre’s
[A] 1, 0 and 1 differential equation
[B] 1, 0 and –1
[C] 2, 1, 0 and –1 d 2y dy 3 3
(1 – x 2 ) 2
– 2x 1 y 0
[D] 1·0, –1 and –2 dx dx 2 2
75. The spin parity of 8 O17 is
will diverge, are located at
5
[A]
2 [A] 0 and 1
3
[B]
2 [B] 0 and –1
5–
[C]
2 [C] –1 and 1
3–
[D] [D] 3/2 and 5/2
2
Applied Science ( Physics )/19- A 12
Text of page 13
79. For a BJT (Bipolar Junction 83. Ten diodes; each of them provides
Transistor), the current 0·7 V drop when the current
amplification factor is 0·9. This through it is 20 mA. They are
transistor is connected in CE connected in parallel and operate
(Common Emitter) configuration. at a total current of 0·1A. What is
When the base current changes by the current flow in each diode?
0·4 mA, the change in collector
[A] 0·1 A
current will be
[B] 0·01 A
[A] 36 mA
[C] 10 A
[B] 9 mA
[D] 20 mA
[C] 4 mA
[D] 3·6 mA 84. The reaction which has the
same transition probability is
80. The Common Mode Rejection Ratio p p is
(CMRR) of a differential amplifier [A] n n
using an operational amplifier is
100 dB. The output voltage for a [B] – p 0 n
differential input of 200 V is 2 V. [C] n n
The common mode gain is
[D] 0 p n
[A] 10
[B] 0·1 85. Half-life of a radioactive material
is 4 days. After 20 days, the
[C] 30 fraction which remains undecayed
[D] 10 will be
[A] 1/32
81. Number of flip-flops needed to [B] 1/20
divide the input frequency by 32 is
[C] 1/16
[A] 2
[D] 1/8
[B] 4
[C] 5 86. The nucleus 41Ca can be described
by the single particle shell model.
[D] 8 The single particle states occupied
by the last proton and the last
82. The Boolean expression, neutron respectively are given by
AB A AB is equivalent to [A] d5/2 and f 7/2
[A] A
[B] d3/2 and f 5/2
[B] A
[C] d5/2 and f 5/2
[C] 1
[D] zero [D] d3/2 and f 7/2
Applied Science ( Physics ) /19- A 13 [ P.T.O.
Text of page 14
87. The difference in the coulomb 90. Nuclear force is
energy between the mirror nuclei
Cr 49 and 25 Mn49 is 6·0 MeV. [A] spin dependent
24
Assuming that the nuclei have a
[B] charge invariant
spherically symmetric charge
2
distribution and e is
[C] saturated
approximately 1·0 MeV-fm and
1 [D] All of the above
k 1 unit, then the radius
40
of the 25 Mn49 nucleus is
91. The reaction e– e is
–13
[A] 4·9 × 10 m forbidden because
[B] 4·9 × 10–15 m
[A] lepton number is not
[C] 5·1 × 10 –15
m conserved
[D] 45·1 × 10–13 m [B] charge is not conserved
[C] angular momentum is not
88. In semi-empirical mass formula, conserved
the surface energy term (S ) is
[D] None of the above
[A] proportional to A2/3
[B] proportional to A–2/3
92. The quark structure of is
1/3
[C] proportional to A
[A] uuu
[D] proportional to A–1/3
[B] udd
89. Which of the following phenomena [C] ddd
can be explained by quantum
mechanical tunneling through the [D] uds
barrier?
1. Alpha decay
s 1
93. Inverse Laplace transform of
2. Field emission of electron from s2 4
metal surface is
3. Beta decay
[A] cos 2x + ½ sin 2x
[A] 1, 2 and 3
[B] cos x + ½ sin x
[B] 1 only
[C] 1 and 2 only [C] cosh x + ½ sinh x
[D] 1 and 3 only [D] cosh 2x + ½ sinh 2x
Applied Science ( Physics )/19- A 14
Text of page 15
94. Fourier transform of the derivative 97. A J -K flip-flop with J = 1 and K = 1
of the Dirac delta-function, is has a 10 kHz clock input. The Q
proportional to output is
[A] a 10 kHz square wave
[A] 0
[B] a 5 kHz square wave
[B] –1
[C] always low
[C] sin(k) [D] always high
[D] ik 98. Five panelists are required to elect
a sixth member to the panel. If any
of the panelists votes against a
member, the member is
95. A current amplifier is
disqualified. What would be the
characterized by
appropriate electronic circuit to be
used in the electronic voting
[A] low input impedance and high
machine to implement the above
output impedance
rule?
[B] high input impedance and low [A] XOR
output impedance
[B] XNOR
[C] low impedance at both input [C] OR
and output terminals
[D] AND
[D] high impedance at both input
and output terminals 99. The voltage resolution of a 12-bit
digital to analog converter (DAC),
whose output varies from –10 V to
+10 V is approximately
96. A transistor is said to be in
saturation region when [A] 1 mV
[B] 5 mV
[A] both collector and emitter
junctions are forward biased [C] 20 mV
[D] 100 mV
[B] both collector and emitter
junctions are reverse biased
100. The isospin and the strangeness of
omega baryon are
[C] the collector junction is
forward biased but the emitter [A] 1, –3
junction is reverse biased
[B] 0, –3
[D] the collector junction is [C] 1, 3
reverse biased but the emitter
junction is forward biased [D] 0, 3
Applied Science ( Physics ) /19- A 15 [ P.T.O.
Text of page 16
SPACE FOR ROUGH WORK
Applied Science ( Physics )/19- A 16 LLL22/19—348×4
Text of page 1
Final Answer Key - Applied Science (Physics)
Held on 12.06.2022
Series 'A'
Q.No. Ans Q.No. Ans Q.No. Ans Q.No. Ans
1 C 26 C 51 A 76 D
2 B 27 D 52 C 77 A
3 C 28 D 53 C 78 C
4 B 29 B 54 B 79 D
5 A 30 C 55 C 80 B
6 B 31 D 56 D 81 C
7 B 32 A 57 C 82 D
8 B 33 B 58 D 83 B
9 C 34 C 59 A 84 B
10 D 35 A 60 C 85 A
11 B 36 B 61 A 86 D
12 A 37 C 62 A 87 B
13 B 38 C 63 B 88 A
14 C 39 B 64 A 89 B
15 D 40 C 65 A 90 D
16 C 41 D 66 A 91 C
17 C 42 C 67 B 92 A
18 C 43 C 68 C 93 D
19 B 44 A 69 C 94 D
20 C 45 C 70 A 95 A
21 B 46 A 71 A 96 A
22 C 47 B 72 D 97 B
23 A 48 D 73 B 98 D
24 B 49 B 74 C 99 B
25 B 50 B 75 A 100 B
Text of page 2
Final Answer Key - Applied Science (Physics)
Held on 12.06.2022
Series 'B'
Q No. Ans Q No. Ans Q No. Ans Q No. Ans
1 D 26 B 51 B 76 B
2 B 27 A 52 C 77 C
3 C 28 B 53 D 78 D
4 D 29 B 54 A 79 C
5 B 30 B 55 B 80 D
6 B 31 C 56 C 81 A
7 A 32 D 57 A 82 C
8 D 33 B 58 B 83 A
9 B 34 A 59 C 84 A
10 A 35 B 60 C 85 B
11 B 36 C 61 B 86 A
12 D 37 D 62 C 87 A
13 C 38 C 63 D 88 A
14 A 39 C 64 C 89 B
15 D 40 C 65 C 90 C
16 D 41 B 66 A 91 C
17 A 42 C 67 C 92 A
18 A 43 B 68 A 93 A
19 B 44 C 69 B 94 D
20 D 45 A 70 D 95 B
21 B 46 B 71 B 96 C
22 B 47 B 72 B 97 A
23 C 48 C 73 A 98 D
24 B 49 D 74 C 99 A
25 C 50 D 75 C 100 C
Text of page 3
Final Answer Key - Applied Science (Physics)
Held on 12.06.2022
Series 'C'
Q No. Ans Q No. Ans Q No. Ans Q No. Ans
1 A 26 D 51 C 76 C
2 C 27 A 52 B 77 D
3 C 28 C 53 C 78 D
4 B 29 D 54 B 79 B
5 C 30 B 55 A 80 C
6 D 31 C 56 B 81 D
7 C 32 D 57 B 82 A
8 D 33 B 58 B 83 B
9 A 34 B 59 C 84 C
10 C 35 A 60 D 85 A
11 A 36 D 61 B 86 B
12 A 37 B 62 A 87 C
13 B 38 A 63 B 88 C
14 A 39 B 64 C 89 B
15 A 40 D 65 D 90 C
16 A 41 C 66 C 91 D
17 B 42 A 67 C 92 C
18 C 43 D 68 C 93 C
19 C 44 D 69 B 94 A
20 A 45 A 70 C 95 C
21 A 46 A 71 B 96 A
22 D 47 B 72 C 97 B
23 B 48 D 73 A 98 D
24 C 49 B 74 B 99 B
25 A 50 B 75 B 100 B
Text of page 4
Final Answer Key - Applied Science (Physics)
Held on 12.06.2022
Series 'D'
Q No. Ans Q No. Ans Q No. Ans Q No. Ans
1 C 26 A 51 D 76 C
2 D 27 C 52 A 77 B
3 D 28 C 53 C 78 C
4 B 29 B 54 D 79 B
5 C 30 C 55 B 80 A
6 D 31 D 56 C 81 B
7 A 32 C 57 D 82 B
8 B 33 D 58 B 83 B
9 C 34 A 59 B 84 C
10 A 35 C 60 A 85 D
11 B 36 A 61 D 86 B
12 C 37 A 62 B 87 A
13 C 38 B 63 A 88 B
14 B 39 A 64 B 89 C
15 C 40 A 65 D 90 D
16 D 41 A 66 C 91 C
17 C 42 B 67 A 92 C
18 C 43 C 68 D 93 C
19 A 44 C 69 D 94 B
20 C 45 A 70 A 95 C
21 A 46 A 71 A 96 B
22 B 47 D 72 B 97 C
23 D 48 B 73 D 98 A
24 B 49 C 74 B 99 B
25 B 50 A 75 B 100 BPage 1 of 16
Source: Haryana Public Service Commission. Question paper published by Haryana Public Service Commission.