Nuclear and Particle Physics MCQs Question and Answer in Engineering Physics Page-7 section-1

61.
To detect trace amounts of a gaseous species in a mixture of gases, the preferred probing tools is

A. ionization spectroscopy with X-rays

B. NMR spectroscopy

C. ESR spectroscopy

D. laser spectroscopy

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62.
In a Stern-Gerlach experiment, the magnetic field is in +Z direction. A particle comes out of this experiment in $$\left| { + {\bf{\hat z}} \uparrow > } \right.$$ state. Which of the following statements are true?

A. The particle has a definite value of the y component of the spin angular momentum

B. The particle has a definite value of the square of the spin angular momentum

C. The particle has a definite value of the x component of spin angular momentum

D. The particle has a definite values of x and y components of spin angular momentum

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63.
By capturing an electron, $${}_{25}^{54}{\text{M}}{{\text{n}}_{29}}$$ transforms into $${}_{25}^{54}{\text{C}}{{\text{r}}_{30}}$$ releasing

A. a neutrino

B. an antineutrino

C. an α-particle

D. a positron

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64.
The order of magnitude of the binding energy per nucleon in a nucleus is

A. 10^-5 MeV

B. 10^-3 MeV

C. 0.1 MeV

D. 10 MeV

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65.
The plot of log A vs time t, where A is activity as shown in the figure, corresponds to decay

A. from only one kind of radioactive nuclei having same half life

B. from only neutron activated nuclei

C. from a mixture of radioactive nuclei having different half lives

D. which is unphysical

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66.
As one moves along the line of stability from ⁵⁶Fe to ²³⁵U nucleus, the nuclear binding energy per particle decreases from about 8.8 MeV to 7.6 MeV. This trend is mainly due to the

A. short range nature of the nuclear forces

B. long range nature of the Coulomb forces

C. tensor nature of the nuclear forces

D. spin dependence of the nuclear forces

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67.
Weak nuclear forces act on

A. both hadrons and leptons

B. hadrons only

C. all particles

D. all charged particles

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68.
The following gives a list of pairs containing
i. a nucleus
ii. one of its properties
Find the pair which is inappropriate

A. i. $${}_{10}^{20}{\text{Ne}}$$ nucleus; ii. stable nucleus

B. i. A spheroidal nucleus; ii. an electric quadrupole moment

C. i. $${}_8^{16}{\text{O}}$$ nucleus; ii. nuclear spin $$J = \frac{1}{2}$$

D. i. ²³⁸U nucleus; ii. Binding energy = 1785 MeV (approximately)

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69.
The nucleus of the atom $${}_4^9{\text{Be}}$$ consists of

A. 13 up quarks and 13 down quarks

B. 13 up quarks and 14 down quarks

C. 14 up quarks and 13 down quarks

D. 14 up quarks and 14 down quarks

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70.
To explain the observed magnetic moment of deuteron (0.8574 μ_N), its ground state wavefunction is taken to be an admixture of S and D states. The expectation values of the z component of the magnetic moment in pure S and pure D states are 0.8797 μ_N and 0.3101 μ_N respectively. The contribution of the D state to the mixed ground state is approximately

A. 40%

B. 4%

C. 0.4%

D. 0.04%

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Nuclear and Particle Physics MCQs Question and Answer in Engineering Physics

61. To detect trace amounts of a gaseous species in a mixture of gases, the preferred probing tools is

Answer & Solution

62. In a Stern-Gerlach experiment, the magnetic field is in +Z direction. A particle comes out of this experiment in $$\left| { + {\bf{\hat z}} \uparrow > } \right.$$ state. Which of the following statements are true?

Answer & Solution

63. By capturing an electron, $${}_{25}^{54}{\text{M}}{{\text{n}}_{29}}$$ transforms into $${}_{25}^{54}{\text{C}}{{\text{r}}_{30}}$$ releasing

Answer & Solution

64. The order of magnitude of the binding energy per nucleon in a nucleus is

Answer & Solution

65. The plot of log A vs time t, where A is activity as shown in the figure, corresponds to decay

Answer & Solution

66. As one moves along the line of stability from 56Fe to 235U nucleus, the nuclear binding energy per particle decreases from about 8.8 MeV to 7.6 MeV. This trend is mainly due to the

Answer & Solution

67. Weak nuclear forces act on

Answer & Solution

68. The following gives a list of pairs containing i. a nucleus ii. one of its properties Find the pair which is inappropriate

Answer & Solution

69. The nucleus of the atom $${}_4^9{\text{Be}}$$ consists of

Answer & Solution

Answer & Solution

61.
To detect trace amounts of a gaseous species in a mixture of gases, the preferred probing tools is

62.
In a Stern-Gerlach experiment, the magnetic field is in +Z direction. A particle comes out of this experiment in $$\left| { + {\bf{\hat z}} \uparrow > } \right.$$ state. Which of the following statements are true?

63.
By capturing an electron, $${}_{25}^{54}{\text{M}}{{\text{n}}_{29}}$$ transforms into $${}_{25}^{54}{\text{C}}{{\text{r}}_{30}}$$ releasing

64.
The order of magnitude of the binding energy per nucleon in a nucleus is

65.
The plot of log A vs time t, where A is activity as shown in the figure, corresponds to decay

66.
As one moves along the line of stability from ⁵⁶Fe to ²³⁵U nucleus, the nuclear binding energy per particle decreases from about 8.8 MeV to 7.6 MeV. This trend is mainly due to the

67.
Weak nuclear forces act on

68.
The following gives a list of pairs containing
i. a nucleus
ii. one of its properties
Find the pair which is inappropriate

69.
The nucleus of the atom $${}_4^9{\text{Be}}$$ consists of