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 63 of 63
- A. fission
- B. beta decay
- C. alpha radiation
- D. gamma radiation
Explanation: URANIUM-238 : Mass number : 238 Atomic number : 92 THORIUM-234 : Mass number : 234 Atomic number: 90 From above, it is clear that mass…
Correct answer: alpha radiation- A. Alpha radiation
- B. Beta radiation
- C. Gamma radiation
- D. X radiation
Explanation: Alpha radiations are doubly positively charged helium nuclei. When such radiation is emitted from a radioactive element, its mass number…
Correct answer: Alpha radiation- A. one curie
- B. one Becquerel
- C. one half life
- D. all of these
Explanation: In radioactivity, activity is defined as disintegrations per second. The SI unit of Activity is Becquerel (Bq).
Correct answer: one Becquerel- A. Electron
- B. Positron
- C. Proton
- D. Neutron
Explanation: In the nuclear reaction 11Na24 → 12Mg24 + X, the atomic number increases by one, indicating a beta-minus decay.
Correct answer: Electron- A. curie
- B. Becquerel
- C. Tesla
- D. both a and b
Explanation: The activity of a radioactive material, which represents the rate of decay of radioactive nuclei, can be expressed in units of both curie…
Correct answer: both a and b- A. 83Bi214
- B. 84Po214
- C. 82Pb214
- D. 41TI214
Explanation: In beta decay, a neutron in the nucleus is transformed into a proton and a beta particle (an electron) is emitted.
Correct answer: 82Pb214- A. Temperature
- B. Pressure
- C. Humidity level
- D. None of the above
Explanation: Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation.
Correct answer: None of the above- A. 47Ag111
- B. 47Ag110
- C. 47Ag112
- D. 49In111
Explanation: In β⁻ emission (beta minus decay): An electron (β⁻ particle) is emitted.→ Atomic number increases by 1, mass number stays same.So the…
Correct answer: 47Ag111- A. α-particles
- B. electrons and neutrons
- C. Positron and neutrinos
- D. Only neutrons
Explanation: Nuclear fission is when heavy unstable nuclei disintegrate to two lighter nuclei along with the emission of a neutron, electron, and energy.
Correct answer: electrons and neutrons- A. Straight
- B. Erratic
- C. Circular
- D. Elliptical
Explanation: The path traced by beta particles in air is erratic. This is because beta particles are high-speed electrons emitted during radioactive…
Correct answer: Erratic- A. Decay constant
- B. Half life
- C. Mean life
- D. Activity
Explanation: The Becquerel (Bq) is the standard unit for measuring radioactivity, specifically the activity of a radioactive substance.
Correct answer: Activity- A. An α-particle
- B. A β-particle
- C. A γ-ray
- D. A neutron
Explanation: Aluminium-27 bombarded by an alpha particle gives phosphorus-30 plus a neutron.
Correct answer: A neutron- A. An α-particle
- B. An electron
- C. A proton
- D. A neutrino
Explanation: A neutrino carries no electric charge, which is a large part of why it interacts so weakly with matter and is so hard to detect.
Correct answer: A neutrino- A. Slow neutron
- B. Thermal neutron
- C. Fast neutron
- D. Both (a) and (b)
Explanation: A neutron with a kinetic energy of a few hundredths of an electron volt has been slowed to roughly the thermal energy of its surroundings…
Correct answer: Slow neutron