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 46 of 63
- A. Particles with zero charge
- B. Particles with positive charge
- C. Particles with negative charge
- D. Particles with dual mass
Explanation: When matter and antimatter collide, the particles destroy each other, with a huge energy release this process is called annihilation.
Correct answer: Particles with zero charge- A. Co-60
- B. I-126
- C. Na-15
- D. Pb-207
Explanation: Cobalt-60 is a radioactive isotope of cobalt that emits gamma rays. It is commonly used in radiation therapy for the treatment of cancer.
Correct answer: Co-60- A. 10 days
- B. 8 days
- C. 45 days
- D. 60 days
Explanation: Mentioned in the textbook (half-life of iodine-31)= 8 days.
Correct answer: 8 days- A. 1/32
- B. 1/16
- C. 1/64
- D. 1/4
Explanation: Amount of Carbon decayed= 22920/5730=4 half lifes passed. The half lifes left are ½ *½ * ½* ½ = 1/16th.
Correct answer: 1/16- A. somatic effect
- B. genetic effect
- C. metbolism effect
- D. mutation effect
Explanation: Somatic effects refer to the immediate and direct effects of radiation exposure on the body's tissues and organs.
Correct answer: somatic effect- A. 30 minutes
- B. 40 minutes
- C. 50 minutes
- D. 60 minutes
Explanation: To determine the half-life of a radioactive element, we can use the formula for exponential decay:Nt = No × (½)^(t / T½)Nt is the count…
Correct answer: 50 minutes- A. Neutron
- B. Photons
- C. Electrons
- D. Positron
Explanation: When neutron is bombarded on any element or particle its no. of neutron increase which result in the formation of a radio isotopesWhere as…
Correct answer: Neutron- A. Remain same
- B. Increased by a factor 2
- C. Decreased by a factor 1
- D. Increased by a factor 1
Explanation: Gamma rays have no charge and no mass therefore atomic and mass number remains same. It carries very high energy. So option A is accurate.
Correct answer: Remain same- A. 0.693
- B. 0.396
- C. 0.953
- D. 0.963
- E. 0.369
Explanation: In radioactivity, the product of half-life Tız and decay constant (4) is equal to 0.693.
Correct answer: 0.693- A. 0.51 MeV
- B. 0.2 MeV
- C. 1.02 MeV
- D. 1.1 MeV
- E. 1 MeV
Explanation: The correct answer is 1.1 MeV. To find the binding energy per nucleon, you must divide the total binding energy of the nucleus by the…
Correct answer: 1.1 MeV- A. Proton
- B. Positron
- C. Electron
- D. Photon
- E. Gamma ray
Explanation: n the equation for nuclear decay p^1 →n^1 + x , the particle x represents a positively charged particle, typically a positron (e+) or beta…
Correct answer: Positron- A. Negative ß particle
- B. Positive B particle
- C. Proton
- D. Alpha particle
- E. Neutron
Explanation: In beta-minus decay, a neutron is converted into a proton, and an electron (beta particle) is emitted.
Correct answer: Negative ß particle- A. Activity
- B. Relative activity
- C. Absolute activity
- D. Stability
- E. Decay constant
Explanation: Relative activity refers to the comparison of the activity level of a particular enzyme, catalyst, or biological substance under different…
Correct answer: Relative activity- A. High-energy particles on unstable elements
- B. Low-energy particles on unstable elements
- C. High-energy particles on stable elements
- D. Low-energy particles on stable elements
Explanation: Artificial radioactive elements are created by bombarding high-energy particles (neutrons, protons, α-particles) on stable elements.
Correct answer: High-energy particles on stable elements- A. Neutron
- B. Electron
- C. Proton
- D. Anti-neutrino
Explanation: Neutrons are used to create artificial radioactive elements because of their unique properties that make them highly effective at…
Correct answer: Neutron- A. m
- B. s
- C. s-1
- D. m-¹
Explanation: The unit of decay constant is per second.
Correct answer: s-1- A. 2ⁿN₀
- B. (1/2)nN0
- C. (½ N₀)ⁿ
- D. (2N₀)ⁿ
Explanation: A half-life is the time it takes for half of the radioactive substance to decay.After one half-life, half of the original quantity…
Correct answer: (1/2)nN0- A. Skin burn
- B. Loss of hair
- C. Induction of cancer
- D. Gene Mutation
Explanation: Gene mutation - NOT a somatic effect, as it affects reproductive (germ) cells and can be passed to offspring.
Correct answer: Gene Mutation- A. 10
- B. 100
- C. 1000
- D. 10000
Explanation: Since 1 Bq is equal to 1 decay per second , 10 Bq will become 10 decays per second.
Correct answer: 10- A. Number of electrons
- B. Number of nucleons
- C. Number of neutrons
- D. Number of protons
Explanation: The sum of atomic number (Z) and number of neutrons is called atomic mass(A). Protons and neutrons are collectively called nucleons.
Correct answer: Number of nucleons