Nuclear and Particle Physics
Basic nuclear properties: size, shape and charge distribution, spin and parity. Binding energy, semi-empirical mass formula, liquid drop model. Nature of the nuclear force, form of nucleon-nucleon potential, chargeindependence and charge- symmetry of nuclear forces. Deuteron problem. Evidence of shell structure, single-particle shell model, its validity and limitations. Rotational spectra. Elementary ideas of alpha, beta and gamma decays and their selection rules. Fission and Fusion. Nuclear reactions, reaction mechanisms, compound nuclei and direct reactions. Classification of fundamental forces. Elementary particles and their quantum numbers(charge, spin, parity, isospin, stangeness, etc.). GellmannNishijima formula. Quark model, baryons and mesons. C, P and T invariance. Application of symmetry arguments to particle reactions. Parity non- conservation in weak interaction. Relativistic kinematics.
PREVIOUS YEAR QUESTION PAPER
SET 2019/7
15. The radius of a 29Cu64 is measured to be 4.8F. Radius of a 12Mg27 nucleus can be
estimated to be:
A) 2.86 F B) 7.1 F C) 5.1 F D) 3.6 F
16. In an inelastic collision --------is not conserved
A) linear momentum B) Kinetic energy
C) Total energy D) none of these
17. The density of the 6C12 nucleus is
A) 24 × 10^17 kg/m^3 B) 2.4 × 10^19 kg/m^3
C) 2.4 × 10^17 kg/m^3 D) 24 × 10^19 kg/m^3
24. α, β, γ radiations come out of a radio-active substance:
A) When it is heated B) When put in an atomic reactor
C) Spontaneously D) By hitting it by other particles
25. When an electron and a positron meet together, two photons are produced. This process is
called:
A) Alpha decay B) Nuclear fusion
C) Annihilation of matter D) Beta decay
26. Which among the following is the spallation reaction?
A) Radio activity B) Nuclear fission
C) Nuclear fusion D) All the above
27.Complete the following nuclear reaction
3Li7+ 2He4 → …… + 0n1
A) 8O6 B) 5B10 C) 1H1 D) 8O17
29. The spin and charge of down quark is
A) ([1/2] & [-1/3e] B) ([1/2] & [2/3e])
C) ([1/2]&[-1/2e]) D) ([-1/2] &[-2/3e] )
60. Which among the following particles obey Pauli’s exclusion principle?
A) gravitons B) photons C) cooper pairs D) none of these
.93. 92 U238 is emitting an α-particle. The resulting nucleus is -------.
A) 91Pa 234 B) 90Th234 C) 93Np234 D) 92U235
96. The Shell model of nucleus could explain------.
A) Magic numbers B) Nuclear fissionc C) Nuclear fusion D) Both B and C
97. Neutrino is a --------.
A) Baryon B) Meson C) Lepton D) hyperon
98. A particle and its antiparticle have ------.
A) same spin and opposite charges B) same spin and same charges
C) different spin and opposite charges D) different spin and different charges
99. Particles that are involved in weak interaction are -------.
A) hadrons only B) leptons only
C) hadrons and leptons D) charged particles
SET 2019/2
18. Which one of- the following particles cannot be accelerated by cyclotron?
A) Electron B) Proton C) α - particle D) Deuteron
41. The nuclear radius of 47Ag207 is about
A) 8.1 fm B) 6.2 fm C) 3.1 fm D) 3 fm
42. The nucleus 6C12 absorbs a neutron and emits a beta particle. The resulting nucleus is
A) 7N14 B) 7 N 13 C) 6C13 D) 6C14
43. The volume of an atomic nucleus is proportional to xth power of total number of
nucleons A. Then the value of x is
A) 1/3 B) 2/3 C) -1/3 D) 1
44. Which of the following is not a property of nuclear force?
A) Short range B) Charge independent
C) Spin independent D) Saturation property
45. Which of the following is not a magic number based on nuclear shell model?
A) 20 B) 50 C) 80 D) 82
46. The radii of nuclei of the elements 88A and 11B are related as, where RA and RB are the radii of A and B, respectively
A) RA =2RB
47. Which of the following is not conserved during a nuclear reaction?
A) Isospin B) Parity
C) Spin D) Magnetic dipole moment
48. The energy released per fission of Uranium is about200 MeV, then the energy
produced by complete fission of 1 kg of uranium in KWh is
A) 22600000 B) 5130000 C) 3600000 D) 1600000
49. Which of the following particle decay is not allowed?
A) lamda0 _>n+gamma B) lmda0 _> p +pi
50. The difference between electron and positron is in their
A) Mass B) Spin C) Charge D) All the above
51. The particles exchanged during strong interaction is
A) Photons B) Bosons C) Mesons D) Gravitons
52. The strangeness number and hypercharge of a nucleon are
A) 0 and 0 B) 1 and 0 C) -1 and 0 D) 0 and 1
53. A meson is made up of
A) Quark and antiquark B) Two quarks
C) Two antiquarks D) Two quarks and one antiquark
54. The half-life of a radioactive element X is 4 days. After 12 days, the mass of X got
reduced to 4 mg. Determine the initial mass of X if its half-life is 4 days.
A) 4 mg B) 8 mg C) 16 mg D) 32 mg .
55. The energy released during a proton-proton cycle in MeV is nearly
A) 2.67 B) 26.7 C) 0.267 D) 267
56. Electronic polarizability (αe)of an atom is related to its radius (r) as
C) αe=4*pi*epsilon zero*r^3
57. The unknown particle X in the nuclear reaction in 13C6 +X_>13N7+e-
A) V e
# electron nutrino
58. When a nucleus emits beta particle
A) its charge changes by one unit B) its charge remains same
C) its mass changes by one unit D) its mass changes by four units
59. Nuclei with same mass number but proton and neutron number interchanged are
called
A) isotopes B) isobars C) mirror nuclei D) isotones
60. According to the nuclear shell model, ground state spin and parity of 17O nucleus is
C) 5/2+.
87. The spin and charge of Up quark is
A) 1/2 and+ 2/3e
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