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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- A. Fermion
- B. Photon
- C. Bosons
- D. Meson
Explanation: Particles with half-integral spin are known as fermions. Fermions are a type of elementary particle that includes particles like…
Correct answer: Fermion- A. Nucleus A
- B. Less than nucleus A
- C. Nucleus B
- D. None of these
Explanation: Binding Energy is the minimum amount of energy required to break all the nucleons (neutrons + protons) from each other.The nucleus has a…
Correct answer: Nucleus B- A. 22
- B. 36
- C. 30
- D. 66
Explanation: The number 66 in "66Zn" represents the mass number of the nuclide, which is the total number of protons and neutrons in the nucleus of an…
Correct answer: 36- A. 6.02 x 10^-23 kg
- B. 2.67 x 10^-27 kg
- C. 1.66 x 10^-27 kg
- D. 6.0210-27 kg
Explanation: The energy in Joules = 931 MeV x 1.60218 x 10-13 J/MeV = 1.4924 x 10-10 J.E=mc2m = E / c2= 1.4924 x 10-10 J / (3 x 108 m/s)2= 1.66x 10-27…
Correct answer: 1.66 x 10^-27 kg- A. 10-15 J
- B. 10-12 J
- C. 1 J
- D. 1017 J
Explanation: Use the formula E=mc2Where E is the energy, m is the mass, and c is the speed of light.E = (1 kg) x (3 x 108 m/s)2= 9 x 1016 JAmong the…
Correct answer: 1017 J- A. 84X220
- B. 81X216
- C. 86X222
- D. 88X215
Explanation: There are a total of 3 alpha emissions each alpha molecule is α42 which means a decrease in mass number by 4 and atomic number by 2 with…
Correct answer: 81X216- A. 6 months
- B. 12 months
- C. 8 months
- D. 16 months
Explanation: For each half-life, the quantity of the substance will be half. Starting from 100%3/4 of 100% = 75% which means 25% should remain.100%…
Correct answer: 8 months- A. Electrostatic and nuclear
- B. Gravitational and strong nuclear
- C. Electrostatic and gravitational
- D. Only nuclear force
Explanation: The only fundamental force that can provide attraction between two neutrons over short distances is the strong nuclear force.
Correct answer: Gravitational and strong nuclear- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The bottom quark carries a charge of -1/3 times the elementary charge (e).
Correct answer: Option D- A. Two extra protons and two extra electrons
- B. Two extra neutrons and no extra electrons
- C. Two extra protons but no extra electrons
- D. Two extra neutrons and two extra electrons
Explanation: Isotopes have same number of electrons and protons but different number of neutrons due to different mass number.
Correct answer: Two extra neutrons and no extra electrons- A. 10- 12m
- B. 10-10m
- C. 10-11m
- D. 10-14m
Explanation: Diameter of a nucleus is approximately 10-14m. This is a fact to be memorized.
Correct answer: 10-14m- A. Increase by 3
- B. Increase by 5
- C. Decrease by 3
- D. Decrease by 5
Explanation: When W emits beta radiations, it results in increase of +1 in atomic charge .
Correct answer: Decrease by 3- A. 1: 16
- B. 16: 1
- C. 1: 8
- D. 8: 1
Explanation: Number of half-lives = 150 min / 25 min = 6 half-livesSimilarly, for element Y, with a half-life of 75 minutes, after 150 minutes, we can…
Correct answer: 1: 16- A. 1/λ and loge2/λ
- B. loge2/λ and τ = 1/λ
- C. λloge2 and 1/λ
- D. λ/loge2 and 1/λ
Explanation: The half-life of a radioactive substance is the time it takes for the number of radioactive atoms to decrease to half of its original…
Correct answer: loge2/λ and τ = 1/λ- A. 10 days
- B. 8 days
- C. 5 days
- D. 6 days
Explanation: Initial mass = 40gFinal mass = 1.25gNumber of half lives = nInitial mass x (1 / 2)n = final mass(1 / 2)n = final mass / initial mass ==>…
Correct answer: 10 days1096. A nucleus emits a radiation, neither its mass number nor charge number change in the radiation is:
- A. α
- B. γ
- C. β
- D. Neutron
Explanation: In the context of nuclear physics, when a nucleus emits radiation without any change in its mass number (A) or charge number (Z), the…
Correct answer: γ- A. 1.58 mg
- B. 1.25 mg
- C. 1.17 mg
- D. 2.56 mg
Explanation: Technetium-99 (Tc-99) has a half-life of 6 hours. You start with 300 mg of it.Amount left = Initial amount × (1/2)^(time /…
Correct answer: 1.17 mg- A. Equal to 1
- B. Less than 1
- C. Greater than 1
- D. Infinity
Explanation: C, the speed of light is the universal speed limit. It is simply impossible for any relativistic or non relativistic speed to even be…
Correct answer: Less than 1- A. 3 x 10^8 J
- B. 9 x 10^13 J
- C. 3 x 10^13 J
- D. 9 x 10^16 J
Explanation: E = mc2 = 0.001 x (3 x108)2 = 10-3 x 9 x 1016 = 9 x1013 J The mass had to be converted to kg and c represents the speed of light.
Correct answer: 9 x 10^13 J- A. +2e
- B. -2e
- C. -e
- D. +3e
Explanation: Alpha particles are helium nuclei; the charge on them is +2e i.e 2He4
Correct answer: +2e