Nuclear and Particle Physics MCQs Question and Answer in Engineering Physics

1.
Which one of the following disintegration series of the heavy elements will give ²⁰⁹Bi as a stable nucleus?

A. Thorium series

B. Neptunium series

C. Uranium series

D. Actinium series

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2.
The lifetime of an atomic state is 1ns. The natural line width of the spectral line in the emission spectrum of this state is of the order of

A. 10^-10 eV

B. 10^-9 eV

C. 10^-6 eV

D. 10^-4 eV

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3.
The quark content of $$\sum {^ + } ,\,{K^ - },\,{\pi ^ - }$$ and p is indicated: $$\left| {\sum {^ + } } \right\rangle = \left| {uus} \right\rangle ;\,\left| {{K^ + }} \right\rangle = \left| {s\overline u } \right\rangle ;\,\left| \pi \right\rangle = \left| d \right\rangle ;\,\left| p \right\rangle = \left| {uud} \right\rangle $$
In the process, $${\pi ^ - } + p \to {K^ - } + \sum {^ + } ,$$ considering strong interactions only, which of the following statements is true?

A. The process is allowed because ΔS = 0

B. The process is allowed because $$\Delta {I_3} = 0$$

C. The process is not allowed because ΔS ≠ 1 and $$\Delta {I_3} \ne 0$$

D. The process is not allowed because the Baryon number is violated

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4.
The four possible configurations of neutrons in the ground state of $${}_4^9Be$$ nucleus according to the shell model, and the associated nuclear spin are listed below. Choose the correct one

A. $${\left( {{}^1{s_{1/2}}} \right)^2}{\left( {{}^1{p_{3/2}}} \right)^3};\,J = \frac{3}{2}$$

B. $${\left( {{}^1{s_{1/2}}} \right)^2}{\left( {{}^1{p_{1/2}}} \right)^2}{\left( {{}^1{p_{3/2}}} \right)^1};\,J = \frac{3}{2}$$

C. $${\left( {{}^1{s_{1/2}}} \right)^1}{\left( {{}^1{p_{3/2}}} \right)^4};\,J = \frac{1}{2}$$

D. $${\left( {{}^1{s_{1/2}}} \right)^2}{\left( {{}^1{p_{3/2}}} \right)^2}{\left( {{}^1{p_{1/2}}} \right)^1};\,J = \frac{1}{2}$$

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5.
In the β-decay of neutron n → p + e^- + $$\overline V e$$ , the anti-neutrino $$\overline V e$$ escapes detection. Its existence is inferred from the measurement of

A. energy distribution of electrons

B. angular distribution of electrons

C. helicity distribution of electrons

D. forward backward asymmetry of electrons

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6.
The strangeness quantum number is conserved in

A. strong weak and electromagnetic interactions

B. weak and electromagnetic interactions

C. strong and weak interactions

D. strong and electromagnetic interactions

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7.
The cross-sections of the reactions $$p + {\prod {} ^ - } \to {\sum {} ^ - } + {K^ + }$$ and $${p^ - } + {\prod {} ^ + } \to {\overline {\sum {} } ^ - } + {K^ - }$$ at a given energy are the same due to

A. Baryon number conservation

B. time reversal invariance

C. charge conjugation

D. parity conservation

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8.
A neutron scatters elastically from a heavy nucleus. The initial and final states of the neutron have the

A. same energy

B. same energy and linear momentum

C. same energy and angular moment

D. same linear and angular momenta

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9.
The mass difference between the pair of mirror nuclei $${}_6^{11}C$$ and $${}_5^{11}B$$ is given to be Δ MeV/c². According to the semi-empirical mass formula, the mass difference between the pair of mirror nuclei $${}_9^{17}F$$ and $${}_8^{17}O$$ will approximately be (rest mass of proton m_p = 938.27 MeV/c² and rest mass of neutron m_n = 939.57 MeV/c²)

A. 1.39Δ MeV/c²

B. (1.39Δ + 0.5) MeV/c²

C. 1.86Δ MeV/c²

D. (1.6Δ + 0.78) MeV/c²

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10.
Consider a nucleus with N neutrons and Z protons. If m_p, m_n and BE represents the mass of the proton, the mass of the neutron and the binding energy of the nucleus respectively and c is the velocity of light in free space, the mass of the nucleus is given by

A. Nm_n + Zm_p

B. Nm_p + Zm_n

C. Nm_n + Zm_p + $$\frac{{BE}}{{{c^2}}}$$

D. Nm_p + Zm_n + $$\frac{{BE}}{{{c^2}}}$$

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Nuclear and Particle Physics MCQs Question and Answer in Engineering Physics

1. Which one of the following disintegration series of the heavy elements will give 209Bi as a stable nucleus?

Answer & Solution

2. The lifetime of an atomic state is 1ns. The natural line width of the spectral line in the emission spectrum of this state is of the order of

Answer & Solution

Answer & Solution

4. The four possible configurations of neutrons in the ground state of $${}_4^9Be$$ nucleus according to the shell model, and the associated nuclear spin are listed below. Choose the correct one

Answer & Solution

5. In the β-decay of neutron n → p + e- + $$\overline V e$$ , the anti-neutrino $$\overline V e$$ escapes detection. Its existence is inferred from the measurement of

Answer & Solution

6. The strangeness quantum number is conserved in

Answer & Solution

7. The cross-sections of the reactions $$p + {\prod {} ^ - } \to {\sum {} ^ - } + {K^ + }$$ and $${p^ - } + {\prod {} ^ + } \to {\overline {\sum {} } ^ - } + {K^ - }$$ at a given energy are the same due to

Answer & Solution

8. A neutron scatters elastically from a heavy nucleus. The initial and final states of the neutron have the

Answer & Solution

Answer & Solution

10. Consider a nucleus with N neutrons and Z protons. If mp, mn and BE represents the mass of the proton, the mass of the neutron and the binding energy of the nucleus respectively and c is the velocity of light in free space, the mass of the nucleus is given by

Answer & Solution

1.
Which one of the following disintegration series of the heavy elements will give ²⁰⁹Bi as a stable nucleus?

2.
The lifetime of an atomic state is 1ns. The natural line width of the spectral line in the emission spectrum of this state is of the order of

4.
The four possible configurations of neutrons in the ground state of $${}_4^9Be$$ nucleus according to the shell model, and the associated nuclear spin are listed below. Choose the correct one

5.
In the β-decay of neutron n → p + e^- + $$\overline V e$$ , the anti-neutrino $$\overline V e$$ escapes detection. Its existence is inferred from the measurement of

6.
The strangeness quantum number is conserved in

7.
The cross-sections of the reactions $$p + {\prod {} ^ - } \to {\sum {} ^ - } + {K^ + }$$ and $${p^ - } + {\prod {} ^ + } \to {\overline {\sum {} } ^ - } + {K^ - }$$ at a given energy are the same due to

8.
A neutron scatters elastically from a heavy nucleus. The initial and final states of the neutron have the

10.
Consider a nucleus with N neutrons and Z protons. If m_p, m_n and BE represents the mass of the proton, the mass of the neutron and the binding energy of the nucleus respectively and c is the velocity of light in free space, the mass of the nucleus is given by