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 36 of 63
- A. Photon
- B. Alpha
- C. Electron
- D. All of these
Explanation: Photon, Alpha and Electron- all have dual nature, which means that they can act as a particle and a wave both.
Correct answer: All of these- A. Released
- B. Absorbed
- C. Reflected
- D. Any of these
Explanation: Fission reactions involve the breakdown of the nucleus to form smaller nuclei. This process releases a huge amount of thermal energy.
Correct answer: Released- A. U
- B. H
- C. O
- D. N
Explanation: Is correct as Centrifugation is also the most common method used for uranium enrichment, relying on the slight mass difference between…
Correct answer: U- A. Electrons
- B. Protons
- C. Alpha rays
- D. Any of these
Explanation: When gas molecules are bombarded with alpha rays they produce UV radiations.
Correct answer: Alpha rays- A. 1925
- B. 0.001925
- C. 0.0001925
- D. 0.01925
Explanation: According to formula, Decay Constant = 0.693/ T1/2 T1/2 = half life of a substance Note 1 hour = 3600 seconds So, = 0.693 / 3600 = 1.925…
Correct answer: 0.0001925- A. 9 x 10^9 years
- B. 4 x 10^9 years
- C. 9 x 10^10 years
- D. 4 x 10^10 years
Explanation: Half Life of radioactive element is defined as the time taken by the sample to decay 50% of its initial value.
Correct answer: 9 x 10^9 years707. A material is made with two different shapes; which surface will absorb more heat in less time?
- A. Rectangular shape of larger area
- B. Circular shape of smaller area
- C. Both will absorb the same heat
- D. Heat absorption is independent of th shape of the material
Explanation: Absorption of heat rate is directly proportional to the surface area, More the surface area More the heat will be absorbed As the…
Correct answer: Rectangular shape of larger area- A. 146 protons
- B. 92 protons
- C. 92 neutrons
- D. 146 neutrons
Explanation: Isotopes are atoms of the same element with same number of protons but different number of neutrons.
Correct answer: 92 protons- A. True in some cases
- B. Only spin up quarks
- C. Only spin down quarks
- D. None of the above options are correct
Explanation: A quark is a type of elementary particle and a fundamental constituent of matter
Correct answer: None of the above options are correct- A. Fission
- B. Fusion
- C. Formation of gas
- D. None of these options are correct
Explanation: Formation of gas is an endothermic process. (Fact)
Correct answer: Formation of gas- A. 0.69 min
- B. 2 min
- C. 2.57 min
- D. 2.31 min
Explanation: If you multiply the average lifetime by the natural logarithm of 2 (the number 0.6931), you get the half-life
Correct answer: 2.31 min- A. Neutrons
- B. Protons
- C. Nucleons
- D. All of them
Explanation: Isotopes are atoms of an element with the same proton number but a different nucleon number.
Correct answer: Protons- A. Curie
- B. Rutherford
- C. Becquerel
- D. All of these
Explanation: The SI unit of radioactivity is becquerel (Bq) and this term is named after Henri Becquerel.
Correct answer: Becquerel- A. Alpha rays
- B. Beta rays
- C. Gamma rays
- D. None of these
Explanation: Alpha rays have highest mass because an alpha particle has 2 protons as well as 2 neutrons . Their mass is 4mp B.
Correct answer: Alpha rays- A. Co
- B. Cl
- C. Ni
- D. P
Explanation: Ni has capability to absorb gamma rays. It is a fact .
Correct answer: Ni- A. Fission reactions
- B. Fusion reactions
- C. Frictional forces
- D. All of these
Explanation: The core of Earth is hot due to frictional forces produced between the outer core and mantle of Earth . B .
Correct answer: Frictional forces- A. Small
- B. Large
- C. Infinite
- D. Zero
Explanation: Fusion reactions are those in which small nuclei join to form a large nucleus. So , a large amount of energy is required to fuse a nuclei.
Correct answer: Large- A. Absorbed
- B. Released
- C. Remain unchanged
- D. None of these
Explanation: When nuclei are formed , energy is released because new bonds are formed.
Correct answer: Released- A. Proton
- B. Beta rays
- C. Gamma rays
- D. All of these
Explanation: Option B is correct as "beta rays" consist of beta particles which are basically the same as electrons, I.e negligible mass and negative…
Correct answer: Beta rays- A. Pion
- B. Proton
- C. K-meson
- D. Photon
Explanation: Option B is correct as fermions have a half-integral spin. Fermions include "protons", neutrons, and electrons.
Correct answer: Proton