Lecturer in Physics Collegiate Education 33/2018 Answer Key

Post: Lecturer in Physics
Department: Collegiate Education
Category Code: 33/18
Qualification: Master Degree in Physics
Date of Test: 27-11-2018


If you find mistakes, comment below

1. The maximum number of eigen values of an n x n matrix is
   • n
   • n²
   • 2n
   • (1/2)n(n-1)
   
   
2. Which among the following is a mathematically incorrect operation?
   • grad div
   • div curl
   • grad curl
   • curl grad
   
   
3. In cylindrical co-ordinates, where surface ρ = 3 and z = 2 intersect is
   • a finite plane
   • a semi infinite plane
   • a cylinder
   • a circle
   
   
4. For a Fourier transform, which of the following statements is correct ``?
   • FT of an even function is even and that of an odd function is odd
   • FT of an even function is odd and the of an odd function is even
   • FT of an even function is even and that of an odd function is even
   • FT of an even function is odd and that of an odd function is odd
   
   
5. The complex function Z^1/2 is
   • single valued
   • double valued
   • n-valued
   • 2n-valued
   
   
6. If A_ij and B_ik are two tensors and A_ijB_ik=δij the Kronecker Delta, then A_ij and B_ik are
   • associate tensors
   • conjugate tensors
   • symmetric tensors
   • fundamental tensors
   
   
7. If P_nx represents the Legendre polynomials, the value of ∫_-1¹[P₂(x)]²dx is
   • 2/3
   • 1/3
   • 2/5
   • 3/5
   
   
8. The value of ∫_c(4-3z)/(z(z-1)(z-2)) dz where c is the circle |z| = 1/2 is
   • 2π
   • 8π
   • 4π
   • zero
   
   
9. The value of a so that the vector (2x+3y)i+(5y-2z)j+(7x+az)k is solenoidal is
   • 1
   • 4
   • -5
   • -7
   
   
10. For a system in which the Lagrangian is not an explicit function of time, the Hamiltonian is
    • constant
    • infinity
    • zero
    • none of these
    
    
11. For a system of two coupled oscillators, the total number of normal modes is
    • 1
    • 2
    • 3
    • 4
    
    
12. In the short wavelength limit, the schrödinger equation reduces to
    • Lagrange's equation
    • Euler-Lagrange equation
    • Hamilton's equations
    • Hamilton-Jocobi equation
    
    
13. What is the dimension of the fractal-Cantor set?
    • 0.52
    • 0.63
    • 0.74
    • 0.85
    
    
14. If [F, H] represents the Poisson bracket between an arbitrary function F and the Hamiltonian of a system H, the equation of motion will be
    • dF/dt = [F, H]
    • dF/dt = [H, F]
    • dF/dt =(delF)/(delt) + [F, H]
    • dF/dt =(delF)/(delt) + [H, F]
    
    
15. The maximum number of rotational degrees of freedom possible for a rigid body is
    • 1
    • 2
    • 6
    • 3
    
    
16. If a₀ donates the Bohr radius, the most probable distance of the electron from the nucleus in a Hydrogen atom in its ground state is
    • a₀/2
    • a₀
    • 2a₀
    • (3a₀)/2
    
    
17. The normalized wave functions Ψ₁ and Ψ₂ correspond to the ground state and the first excited state of a particle in a potential. An operator  acts on the wave functions as  Ψ₁= Ψ₂ and  Ψ₂ = Ψ₁. The expectation value of  for the state Ψ = (3 Ψ₁ + 4 Ψ₂)/6 is
    • 0.67
    • 0.33
    • 0.44
    • 0.82
    
    
18. The value of the commutator [x⁴ , p_x] is
    • iℏ
    • (iℏ)⁴
    • 4iℏx⁴
    • 4iℏx³
    
    
19. Application of time independent perturbations to linear stark effect of hydrogen atom
    • Completely removes degeneracy of n = 2 level and splits it into four levels
    • Partially removes degeneracy of n = 2 levels and splits it into three levels
    • Partially removes degeneracy of n = 2 level and splits it into two levels
    • Does not remove degeneracy to any extent
    
    
20. The wave function of a particle is given by Ψ =1/√2 Ф₀ , where Ф₀ is the normalized eigen function with energy E₀. The expectation value of the Hamiltonian in the state Ψ is
    • E₀
    • E₀/√2
    • E₀/(2)
    • √2 E₀
    
    
21. For a one dimensional potential well specified by V(x) = 0 for -a < x < a and V(x) = o for |x| > a, the zero point energy is
    • Some value greater then zero
    • Some value less than zero
    • Equal to zero
    • 1/2 ħω
    
    
22. The total spin angular momentum S of a system of three electrons is
    • 1/2
    • 0 and 1
    • 1
    • 1/2 and 3/2
    
    
23. The phase shifts measured for the elastic scattering of 50 MeV neutrons from a nucleus are δ₀= 90^@ ; δ₁ = 60^@ . The total cross section is
    • 13π/k²
    • 4π/k²
    • π/k²
    • 7π/k²
    
    
24. For a Hermitian operator, the eigen values are
    • zeros
    • real
    • complex
    • imaginary
    
    
25. The eigen functions of angular momentum operator are
    • Bessel function
    • Gamma function
    • Hermite polynomials
    • Spherical harmonics
    
    
26. A charged particle is moving in a helical path under the influence of a constant magnetic field. The initial velocity of the particle is such that the component along the magnetic field is twice the component in the plane normal to the magnetic field. What will be the ratio of the pitch to the radius of the helical path?
    • π/2
    • π
    • 2π
    • 4π
    
    
27. A square wire loop carries a steady current I. Let R be the shortest distance from the centre to the side. What will be the magnetic field at the centre of the square loop?
    • (µ₀I/πR
    • µ₀I/6πR
    • √2 µ₀I/πR
    • µ₀/(√2 πR)
    
    
28. The magnetic field at a distance R from a straight wire carrying a steady current I is proportional to
    • I/R
    • IR
    • I/R²
    • I²/R
    
    
29. Which of the following thermodynamic relation is correct?
    • dU = T dS + P dV
    • dU = T dS - P dV
    • dU = T dS + G dP
    • dU = T dS - G dP
    
    
30. Which mode of electromagnetic radiation cannot propagate through a rectangular waveguide?
    • TE
    • TM
    • TEM
    • All these
    
    
31. Which is the least symmetric crystal system?
    • cubic
    • triclinic
    • orthorhombic
    • monoclinic
    
    
32. The amount of split in an energy level in the case of anomalous Zeeman effect due a magnetic field B, from non field level (where µ_B is the Bohr magnetron, m_j is the magnetic total angular momentum quantum number and g is the Lande g factor) is given by
    • (gm_j)/(µ_B)B
    • (gµ_B)/(m_j)B
    • gµ_Bm_jB
    • (m_jµ_B)/(g)B
    
    
33. The substances, which are expected to show electron spin resonance spectroscopy, are
    • paramagentic
    • diamagnetic
    • ferromagnetic
    • none of these
    
    
34. The selection rule governing the transition between different energy levels in pure rotational Raman spectra, in terms of rotational quantum number J, is
    • ΔJ = 0 or ±1 only
    • ΔJ = ±1 only
    • ΔJ = 0 or ±2 only
    • ΔJ = ±2 only
    
    
35. A radio wave has electric field intensity 10^-4 Vm^-1 at the location of a receiving antenna. What will be the magnetic flux density?
    • zero
    • 3.3 x 10^-4 T
    • 1.1 x 10^-9 T
    • 3.3 x 10^-13 T
    
    
36. The cut off frequency of TE₁₀ dominant mode of an air filled rectangular wave guide of dimension x = 8 cm and y = 4 cm is 1875 MHz. What will be the cut off frequency of the TE₁₀ dominant mode for another wave guide of dimension x = 8cm and y = 6 cm?
    • 1875 MHz
    • 1945 MHz
    • 707 MHz
    • 1947 MHz
    
    
37. The ratio of the electric field vector E and magnetic field vector H has the dimension of
    • current
    • resistance
    • inductance
    • capacitance
    
    
38. For the reverse leakage current of a BJT in CB (I_CBO ) and CE(I_CEO ) configuration, which among the following statements is true?
    • I_CBO > I_CEO
    • I_CBO = I_CEO
    • I_CBO < I_CEO
    • none of these
    
    
39. With a 1 MHz clock frequency, eight bits can be parallel entered into a shift register in
    • 8`mus`
    • propagation delay time of eight flip flops
    • propagation delay time of one flip flop
    • 1`mus`
    Question Error
    
    
40. For an ideal OPAMP integrator circuit, the peak value of output voltage
    • is independent of frequency of the signal
    • decreases with frequency of the signal
    • increases with frequency of the signal
    • decreases with amplitude of the signal
    
    
41. In a 4 bit R-2R ladder digital to analog converter, R = 10kΩ and V_ref is 10V. The current resolution of the converter is
    • 10.5µA
    • 50.25µA
    • 62.5µA
    • 6.25µA
    
    
42. In the expression for the binding energy of a nucleus according to the liquid drop model, which among the following terms arises due to Pauli's exclusion principle?
    • volume term
    • surface term
    • pairing term
    • asymmetry term
    
    
43. The strangeness quantum number S, in the Quark Model for up (u) and down (d) quarks are
    • zero for both u and d
    • +1 for both u and d
    • -1 for both u and d
    • -1 for u and +1 for d
    
    
44. The relation between the Einstein coefficients A₂₁ and B₂₁ is
    • A₂₁/B₂₁ = 1
    • A₂₁/B₂₁ = 1/2
    • A₂₁/B₂₁ = (8πhv²)/(c²)
    • A₂₁/B₂₁ = (8πhv³)/(c³)
    
    
45. In a canonical ensemble, the elements differ in their
    • volume
    • energy
    • temperature
    • number of particles
    
    
46. The Halmholtz free energy F, absolute temperature T and partition function Z of a canonical ensemble are related as
    • F = - kT ln Z
    • F = kT ln Z
    • F = - kTZ
    • F = kTZ
    
    
47. The mass defect per nucleon is called
    • packing fraction
    • quadrupole moment
    • angular momentum
    • binding energy
    
    
48. In how many directions, the electrons in a quantum dot are confined?
    • 1
    • 2
    • 3
    • 4
    
    
49. The energy versus wave vector graph of an electron in free space is a
    • Straight line
    • parabola
    • hyperbola
    • circle
    
    
50. The bandgap energy of GaAs is about
    • 0.42 eV
    • 1.42 eV
    • 0.42 keV
    • 1.42 keV
    
    
51. The light emission mechanism in LED is
    • electroluminescence
    • photoluminescence
    • chemiluminescence
    • thermoluminescence
    
    
52. In a first order phase transition, which among the following statements is true?
    • volume is continuous at the boundary
    • entropy is continuous at the boundary
    • entropy is discontinuous at the boudnary
    • a latent heat is not involved
    
    
53. The chemical potential of a photon gas is
    • infinity
    • finite
    • imaginary
    • zero
    
    
54. When a particle of rest mass m attains the velocity of light, its mass becomes
    • zero
    • m
    • infinity
    • 2m
    
    
55. For a conservative system, the slop of the potential energy versus position curve gives
    • kinetic energy
    • force
    • power
    • momentum
    
    
56. Are two simultaneous events, happening at the same point, simultaneous in all inertial frames?
    • yes
    • no
    • depends on the velocity of the frames
    • none of these
    
    
57. The critical field of a superconductor at the critical temperature is
    • inifinity
    • zero
    • finite
    • depends on the superconductor
    
    
58. In a C60 fullerence molecule, how many pentagonal sides exist?
    • 24
    • 6
    • 20
    • 12
    
    
59. The open circuit voltage of a solar cell
    • Increases with temperature first and then decreases
    • decreases with temperature first and then increases
    • Decreases with temperature
    • Increases with temperature
    
    
60. The bandwidth of an amplifier is the range of frequencies at the limits of which its voltage gain falls by _____ from the maximum gain.
    • 1 dB
    • 3 dB
    • 9 dB
    • 70 dB
    
    
61. Which transistor configuration is commonly used for impedance matching?
    • common emitter
    • common base
    • common collector
    • common mode
    
    
62. What is the hybridization in graphene?
    • sp
    • sp2
    • sp3
    • sp4
    
    
63. What happens to the X-ray diffraction peaks from a polycrystalline solid, when its crystalline size decreases?
    • become broad
    • become narrow
    • no effect
    • disappears
    
    
64. The fundamental effect that is used in the conversion of solar energy to heat energy is
    • Photovoltaic effect
    • Faraday effect
    • Joule-Kelvin effect
    • Green house effect
    
    
65. In biomass, the solar energy is stored in the form of
    • electrical energy
    • heat energy
    • chemical energy
    • mechanical energy
    
    
66. the dimensional of the phase space of a particle moving in a plane is
    • 4
    • 1
    • 2
    • 0
    
    
67. Which among the following is an elementary particle?
    • neutron
    • kaon
    • electron
    • sigma
    
    
68. The sodium D lines arise due to the transitions
    • from P state to S state
    • from F state to S state
    • from F state to D state
    • from D state to S state
    
    
69. The departure of relative permeability from unity is called
    • Magnetic field strength
    • Magnetic susceptibility
    • Magnetic flux density
    • Magnetizing field intensity
    
    
70. If the Hall co-efficient of a specimen is positive, the current conduction in the specimen is dominated by
    • electrons
    • phonons
    • photons
    • holes
    
    
71. The tools used to represent thoughts, ideas, knowledge and concepts are
    • Rubrics
    • Feedback tools
    • Renew and reflection tools
    • Graphic organizers
    
    
72. Which of the following is not a basic purpose of lecture method?
    • To motivate
    • To explore
    • To renew
    • To expand
    
    
73. Validity of a test means
    • Purposiveness
    • Objectiveness
    • Regularity
    • Consistency
    
    
74. The criterion which is least important while planning a learning experience?
    • Expertise of the teacher
    • Extent of realisation of objectives
    • Mental level of the learner
    • Practicability of the experience
    
    
75. Which of the following process skill uses a test under controlled conditions?
    • Experimenting
    • Hypothesizing
    • Inferring
    • Measuring
    
    
76. Which of the following assessment technique is most appropriate for assessing creative thinking in students?
    • Reasoning questions
    • Open ended questions
    • Logical questions
    • Hypothesising
    
    
77. The process of maintaining a gradation by which specific items are gradually presented one by one in the hierarchical order is
    • Progressive differentiation
    • Narration
    • Integrative Reconciliation
    • Exposition
    
    
78. Which is not considered as a self-reporting technique?
    • Questionnaire
    • Autobiography
    • Interview
    • Performance test
    
    
79. "A teacher should plough the sort before souring the seed". This statement indicates
    • Preparing the technical support in advance
    • Planning innovative strategies for teaching
    • Developing a rapport with the students
    • Instilling an intrinsic motivation in students to learn
    
    
80. Skipping is an approach used to cater the needs of
    • Average learners
    • Differentially abled
    • Gifted
    • Slow learners
    
    
81. Who said the Constituent Assembly that the Directive Principles of State Policy are like a cheque on a bank payable at the convenience of the bank?
    • B.R. Ambedkar
    • Jawaharlal Nehru
    • K.T. Shah
    • N. Madhava Rao
    
    
82. 'Contempt of court' place restriction on :
    • Right to equality
    • Right to freedom
    • Right to cultural and educational Rights
    • None of these
    
    
83. Which commission recommended the abolition of the IAS and IPS?
    • Shah Commission
    • Sarkaria Commission
    • Venkata Chalaiah Commission
    • Rajamannar Commission
    
    
84. The scheme Antyodaya Anna Yojana (AAY) was launched by the government on :
    • 26 January 1999
    • 25 December 2000
    • 31 May 2000
    • 24 October 2005
    
    
85. The authorization for withdraw of funds from the consolidated fund of India must come from
    • The Parliament of India
    • The President of India
    • The Prime Minister of India
    • The Union Minister
    
    
86. The system of 'Privacy Purses' in respect of former rules of Indian states before independence was abolished by the constitution through :
    • 1st Amendment Act, 1951
    • 26th Amendment Act, 1971
    • 38th Amendment Act, 1975
    • 52nd Amendment Act, 1985
    
    
87. The Environmental (Protection) Act was enacted in the year
    • 1972
    • 1984
    • 1986
    • 1992
    
    
88. The Emergency Powers of President was taken from which Constitution?
    • Constitution of South Africa
    • Constitution of Germany
    • Constitution of Australia
    • Constitution of Canada
    
    
89. What is the time limit to get the information concerning life and liberty of a person under RTI Act?
    • 30 days
    • 3 days
    • 24 hours
    • 48 hours
    
    
90. Members of the Rajya Sabha are not associated with
    • Public Account Committee
    • Committee on Public Undertakings
    • Estimate Committee
    • All these
    
    
91. Who was the K.P.C.C. President at the time of Indian Independents?
    • K. Kelappan
    • Panampilly Govindamenon
    • C. Kesavan
    • Pattom. A. Thanupillai
    
    
92. First annual session of SNDP was help at which of the following places?
    • Aluva
    • Aruvipuram
    • Varkala
    • Sivagiri
    
    
93. Who was the author of 'Jathikummi'?
    • Pandit Karuppan
    • Kumaranassan
    • Sree Narayana Guru
    • Thycaud Ayya Vaikundar
    
    
94. Among the following organisations which one is the oldest?
    • Araya Samajam
    • Samathwa Samajam
    • Yogakshema Sabha
    • Ananda Mahasabha
    
    
95. Among the following reforms who is not belongs to the upliftment of Namboothiri Women?
    • Lalithambika Antharjanam
    • Parvathi Nenmenimangalam
    • Arya Pallam
    • Devaki Antharjanam
    
    
96. Name the first unmanned Tank developed by DRDO in India recently
    • Arjun
    • Arihant
    • Sivalik
    • Muntra
    
    
97. Who was FIFA under 17 World Cup foot ball?
    • England
    • Spain
    • Brazil
    • India
    
    
98. Who is the winner of Vayalar Award 2017?
    • U.k. Kumaran
    • K.R. Meera
    • Subashchandran
    • T.D. Ramakrishnan
    
    
99. Who is appointed as the 15th Finance Commission Chairman of India?
    • Y.V. Reddy
    • C.Rangarajan
    • N.K. Singh
    • Dr. Vijay kelkar
    
    
100. What is the ordinal status of Antonio Gutters among the secretary Generals of UNO?
     • Tenth
     • Seventh
     • Ninth
     • Eighth