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 14 of 63
- A. 1 ms
- B. Less than 1𝜇s
- C. More than 1
- D. None of these
Explanation: The time taken is usually less than 1 microsecond for the entire electron pulse to reach the anode.
Correct answer: Less than 1𝜇s- A. Range of ionizing particle
- B. Mass of ionizing particle
- C. Charge of ionizing particle
- D. None
Explanation: Geiger-Muller counters are primarily used for detecting ionizing radiation but do not provide information about the range, mass, or charge…
Correct answer: None- A. Atomic number only
- B. Mass number only
- C. Atomic number, mass number, and energy
- D. Energy only
- E. none of them
Explanation: The correct answer is: None of the options is entirely correct. In nuclear reactions, certain quantities may be conserved depending on the…
Correct answer: none of them- A. 92 U 235 is bombarded with fast-moving neutron
- B. 92 U 235 is bombarded with thermal neutron
- C. 92 U 238 is bombarded with slow-moving neutron
- D. 92 U 235 is being unstable breaks into smaller fragments
Explanation: Fast neutrons are more likely to induce fission reactions in uranium-235.
Correct answer: 92 U 235 is bombarded with fast-moving neutron- A. 7N14 + 0n1 → 7N16 + 1H1
- B. 16S32 + 1H1 → 17Cl35 + 2He4
- C. O16 + 0n1 → 7N14 + 3 1H1 + 2 -1 β0
- D. 1H1 + 1H1 → 2He4
Explanation: his describes a fusion reaction where two hydrogen nuclei combine to form helium-4
Correct answer: 1H1 + 1H1 → 2He4- A. The substance completely disintegrates in 20 days
- B. The substance completely disintegrates in 40 days
- C. 1/8 parts of the mass of the substance will be left intact at the end of 40 days
- D. 7/8 parts of the mass of the substance disintegrates in 30 days
Explanation: Correct. After one half-life, 1/2 of the substanceIn summary, the correct option is **d.
Correct answer: 7/8 parts of the mass of the substance disintegrates in 30 days- A. √2C
- B. 2C
- C. C/√2
- D. C/2
Explanation: Correct. Removing the dielectric doubles the capacitance in a parallel plate capacitorIn summary, the correct option is **b.
Correct answer: 2C- A. Atomic number only
- B. Atomic mass only
- C. Atomic number and mass number and energy
- D. Energy only
Explanation: Correct. In many nuclear reactions, conservation laws dictate that both atomic number and mass number, as well as energy, are conserved In…
Correct answer: Atomic number and mass number and energy- A. Do not get deflected at all
- B. Get deflected in the direction of the field
- C. Get deflected in the direction opposite to the field
- D. Get deflected in the direction perpendicular to the field
Explanation: Correct. Charged particles like alpha rays experience deflection perpendicular to the magnetic field.In summary, the correct option is…
Correct answer: Get deflected in the direction perpendicular to the field- A. a > b, b > c
- B. a < b, b > c
- C. a < b, b < c
- D. a > b, b < c
Explanation: Correct. The correct order is x-rays > γ-rays > ultraviolet raysIn summary, the correct option is **b.
Correct answer: a < b, b > c- A. 1 KeV
- B. 0.5 KeV
- C. 0.02 KeV
- D. 0.01 KeV
Explanation: Fast-moving neutrons typically have energies in the range of 1 KeV to 10 MeV (mega-electron volts).
Correct answer: 1 KeV272. Alpha particle has
- A. Less ionization and High Penetration
- B. High ionization and Less Penetration
- C. High ionization and High Penetration
- D. Less ionization and Less Penetration
Explanation: Alpha particles are relatively large and heavy, consisting of two protons and two neutrons.
Correct answer: High ionization and Less Penetration- A. Greater
- B. Less
- C. Equal
- D. Either a or c
Explanation: Gamma rays are electromagnetic radiation, which means they are high-energy photons.
Correct answer: Greater- A. GM counter
- B. Wilson Cloud Chamber
- C. Solid state detector
- D. Both a and c
Explanation: While both GM counters and solid-state detectors are used to detect radiation, only solid-state detectors operate under reverse bias.GM…
Correct answer: Solid state detector- A. Both produce ionization
- B. Both are deflected by Magnetic field
- C. Both are deflected by Electric field
- D. All of these
Explanation: Alpha particles are highly ionizing due to their large charge and mass.
Correct answer: Both produce ionization- A. Helium
- B. Xenon
- C. Krypton
- D. Cobalt
Explanation: Cobalt-60 is a radioactive isotope of cobalt that is commonly used in radiation therapy for cancer treatment.
Correct answer: Cobalt277. There are _ leptons
- A. 3
- B. 4
- C. 5
- D. 6
Explanation: There are six leptons in the Standard Model of particle physics:Charged leptons: Electron (e-), Muon (μ-), Tau (τ-)Neutrinos: Electron…
Correct answer: 6- A. Inverse
- B. Direct
- C. Depends on radiation
- D. None of these
Explanation: The relationship between penetrating power and ionization power of radiation is inverse.Explanation:Penetrating power and ionization power…
Correct answer: Inverse- A. X-rays
- B. Ultraviolet
- C. Infrared
- D. Gamma rays
Explanation: The human body emits infrared radiation as a result of its temperature.
Correct answer: Infrared- A. Moderators
- B. Control rod
- C. Protons
- D. Heavy water
Explanation: n a controlled nuclear fission reaction, control rods are used to regulate the reaction.Nuclear fission is a process where heavy atomic…
Correct answer: Control rod