Free Nuclear Physics MCQs with Answers
1,254 Nuclear Physics MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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1,254 questions · page 58 of 63
- A. J.J Thomson
- B. Chadwick
- C. Rutherford
- D. Neil Bohr
Explanation: Sir James Chadwick is the correct answer. He discovered the neutron in 1932, which is a subatomic particle with no charge.
Correct answer: Chadwick- A. Electron
- B. Positron
- C. Proton
- D. Photon
Explanation: Protons are subatomic particles found in the nucleus of atoms. They have a much greater mass than electrons, approximately 1.673 x 10-27…
Correct answer: Proton- A. α-rays
- B. β-rays
- C. γ-rays
- D. X-rays
Explanation: Alpha particles have the highest ionization power of the three main types of ionizing radiation: alpha, beta, and gamma.
Correct answer: α-rays- A. 22
- B. 36
- C. 30
- D. 66
Explanation: The following is the solution: The number 66 in "Zn66" represents the mass number of the nuclide, which is the total number of protons and…
Correct answer: 36- A. 84X220
- B. 81X216
- C. 86X222
- D. 88X215
Explanation: The following is the solution: There are a total of 3 alpha emissions each alpha molecule is α42 which means a decrease in mass number by…
Correct answer: 81X216- A. De-excitation of atom
- B. Excitation of atom
- C. De-excitation of nucleus
- D. Excitation of nucleus
Explanation: The correct option is the de-excitation of the nucleus because gamma radiation is a form of electromagnetic radiation emitted by the…
Correct answer: De-excitation of nucleus- A. A
- B. B
- C. C
- D. D
Explanation: The bottom quark carries a charge of -1/3 times the elementary charge (e).
Correct answer: D- A. s- 1
- B. s
- C. N
- D. m
Explanation: The unit of decay constant is inverse seconds (s⁻¹). It is also sometimes represented in other inverse time units such as per minute, per…
Correct answer: s- 1- A. 90
- B. 91
- C. 89
- D. 92
Explanation: An α-particle decreases the atomic number bt 2 and mass number by 4. And β-particle emission increases the atomic number by 1.
Correct answer: 91- A. One decay per second
- B. Two decay per second
- C. Three decay per second
- D. Four decay per second
Explanation: One Becquerel (Bq) is defined as one decay per second. It's the SI unit of radioactivity, and it measures the rate of radioactive decay.If…
Correct answer: One decay per second- A. energy.
- B. particle.
- C. electric charge.
- D. ionising radiation.
Explanation: Ionising radiation: A Geiger Muller counter, often called a Geiger counter, is specifically designed to detect ionising radiation.
Correct answer: ionising radiation.- A. A
- B. B
- C. C
- D. D
Explanation: The question describes the nucleus ⁸²Pb²¹⁴ emitting an electron. This process is known as beta-minus decay (β⁻ decay).In beta-minus decay…
Correct answer: D- A. A
- B. B
- C. C
- D. D
Explanation: Gamma (γ) rays are a form of electromagnetic radiation, meaning they are pure energy and travel at the speed of light, which is the…
Correct answer: C- A. I only.
- B. III only.
- C. I and II.
- D. II and III.
Explanation: When an alpha particle encounters an atom, it eliminates neutrons and electrons.
Correct answer: II and III.- A. 1 atomic mass unit (u)
- B. 2 atomic mass units (u)
- C. 4 atomic mass units (u)
- D. 8 atomic mass units (u)
Explanation: The correct answer is Option C: 4 atomic mass units (u). When a radioactive nucleus emits an alpha particle, it loses two protons and two…
Correct answer: 4 atomic mass units (u)- A. I only
- B. III only
- C. I and II
- D. II and III
Explanation: Alpha particles (Option I) and beta particles (Option II) are charged particles, hence they are affected by electric and magnetic fields.
Correct answer: I and II- A. controlled fusion reaction
- B. controlled fission reaction
- C. uncontrolled fusion reaction
- D. uncontrolled fission reaction
Explanation: The correct answer is Option C: uncontrolled fusion reaction. In the context of an atomic bomb explosion, the rapid and uncontrolled…
Correct answer: uncontrolled fusion reaction- A. Mass number remains 226, atomic number becomes 89
- B. Mass number becomes 225, atomic number remains 88
- C. Mass number becomes 227, atomic number decreases to 87
- D. Mass number remains 226, atomic number decreases to 87
Explanation: When a beta particle is emitted, a neutron in the nucleus is transformed into a proton.
Correct answer: Mass number remains 226, atomic number becomes 89- A. I only.
- B. II only.
- C. I and III.
- D. II and III.
Explanation: The correct answer is I only. The Wilson cloud chamber operates on the principle that supersaturated vapours condense more easily on ions.
Correct answer: I only.- A. A) Gamma rays have less penetration power than alpha particles.
- B. B) Gamma rays have less penetration power than beta particles.
- C. C) Gamma rays have the same penetration power as alpha particles.
- D. D) Gamma rays have greater penetration power than both alpha and beta particles.
Explanation: Gamma rays are electromagnetic radiation with no mass and no charge, allowing them to penetrate materials far more deeply than charged…
Correct answer: D) Gamma rays have greater penetration power than both alpha and beta particles.