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 11 of 63
- A. 3.74×1093.74 x 10^9 disintegration per sec
- B. 3.70×10103.70 x 10^10 disintegration per sec
- C. 3.55×10103.55 x 10^10 disintegration per sec
- D. 3.60×10103.60 x 10^10 disintegration per sec
Explanation: One curie (Ci) is defined as the activity of a quantity of radioactive material in which there are 3.70×10103.70×1010 disintegrations per…
Correct answer: 3.70×10103.70 x 10^10 disintegration per sec- A. 92U235
- B. 92U238
- C. 92U234
- D. 92U239
Explanation: In a fast breeder reactor, 92U238 is used as fuel. The 92U238 isotope can undergo neutron capture and become U239, which further undergoes…
Correct answer: 92U238- A. Hardness
- B. Mass
- C. Half-life
- D. Total life
Explanation: The half-life of a radioactive material is a characteristic property that can be measured to identify and quantify the radioactive…
Correct answer: Half-life- A. Fission reaction
- B. Fusion reaction
- C. Chain reaction
- D. Chemical reaction
Explanation: In a chain reaction, the neutrons released during fission can trigger additional fission events, leading to a self-sustaining reaction.
Correct answer: Chain reaction- A. Protons
- B. Electrons
- C. Neutrons
- D. Nothing
Explanation: An alpha particle consists of two protons and two neutrons (helium nucleus).
Correct answer: Nothing- A. Rectilinear
- B. Curved
- C. Erratic
- D. Elliptical
Explanation: The path of an alpha particle is curved due to the electrostatic interaction with the positively charged nucleus.
Correct answer: Curved- A. Alpha-rays
- B. Beta-rays
- C. Gamma-rays
- D. X-rays
Explanation: Beta-rays are more penetrating than alpha-rays and are often used for treating internal infections in the body.
Correct answer: Beta-rays- A. +1
- B. +2
- C. -2
- D. -1
Explanation: An alpha particle is a helium nucleus consisting of two protons and two neutrons.
Correct answer: +2- A. Through direct collision
- B. Through electrostatic attraction
- C. Through electrostatic repulsion
- D. All of the above
Explanation: An alpha particle can ionize an atom through direct collisions, electrostatic attraction, and electrostatic repulsion.
Correct answer: All of the above- A. X-rays
- B. Alpha-rays
- C. Beta-rays
- D. Gamma-rays
Explanation: TV sets and microwave ovens typically do not emit ionizing radiation. However, if there are any emissions, they are more likely to be…
Correct answer: Gamma-rays- A. Beta-particle source
- B. Alpha-particle source
- C. Gamma-rays source
- D. Neutron source
Explanation: Strontium-90 is a beta emitter and is used as a beta-particle source in various applications, including medical treatments and industrial…
Correct answer: Beta-particle source- A. 10 times more
- B. 100 times more
- C. 100 times less
- D. 10 times less
Explanation: Alpha particles have much higher ionization and penetration power compared to beta particles.
Correct answer: 100 times more- A. ZnS
- B. Barium platinocyanide
- C. Sodium iodide
- D. All of the above
Explanation: Alpha particles can produce fluorescence in various materials, including ZnS, barium platinocyanide, and sodium iodide.
Correct answer: All of the above214. CFC is used in:
- A. Refrigeration
- B. Aerosol spray
- C. Plastic foam industry
- D. All of the above
Explanation: Chlorofluorocarbons (CFCs) have been used in various applications, including refrigeration, aerosol spray propellants, and the production…
Correct answer: All of the above- A. Trajectory
- B. Range
- C. Firing level
- D. Limit
Explanation: The average distance covered by an alpha particle in air before its ionizing power ceases is called its range.
Correct answer: Range- A. Alpha-rays
- B. Beta-rays
- C. Gamma-rays
- D. Neutron-rays
Explanation: Gamma-rays possess the greatest penetration power among the given options.
Correct answer: Gamma-rays- A. Light waves
- B. Gamma-rays
- C. Microwaves
- D. X-rays
Explanation: Gamma rays are a form of electromagnetic radiation, similar to light waves.
Correct answer: Light waves- A. Smaller ionization power
- B. Greater ionization power
- C. Neither greater nor smaller ionization power
- D. Same ionization power
Explanation: Alpha particles have greater mass and charge than beta particles, but they have smaller penetration power due to their larger ionization…
Correct answer: Smaller ionization power- A. 1 rem per week
- B. 5 rem per week
- C. 4 rem per week
- D. 3 rem per week
Explanation: The maximum safe limit dose for radiation exposure is typically set at 4 rem per week for individuals working in a nuclear power station.
Correct answer: 4 rem per week- A. Alpha-rays
- B. Beta-rays
- C. Gamma-rays
- D. X-rays
Explanation: X-rays are commonly used for medical imaging and therapeutic purposes, including the treatment of skin conditions.
Correct answer: X-rays