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. Electrons.
- B. Muons.
- C. Neutrinos.
- D. Neutrons.
Explanation: Strong nuclear force is experienced by particles in the nucleus, it is the attractive force that holds the nucleus together.
Correct answer: Neutrons.- A. One up quark and two down quarks.
- B. Up quarks and two down quarks.
- C. Two up quarks and one down quark.
- D. One up quark and one down quark.
Explanation: The sum of the relative masses of one up quark and two down quarks is equal to the mass of a neutron and the overall charge by adding the…
Correct answer: One up quark and two down quarks.- A. Radioactive
- B. Fission
- C. Ionization
- D. Fusion
Explanation: The correct answer is D) Fusion. Laser technology can be used in fusion reactions, such as in inertial confinement fusion, where lasers…
Correct answer: Fusion- A. 4.48 MeV
- B. 4.84 MeV
- C. 3 x 10^2 MeV
- D. 4.84 eV
Explanation: Mass defect multiplied by square of speed is equal to the energy (E). You are given themass defect and you know the speed of light so just…
Correct answer: 4.84 MeV- A. 5 days
- B. 4 days
- C. 10 days
- D. 6 days
Explanation: Radioactive decay is an exponential decay process. Half life measures the time it takes for a given amount of the substance to become…
Correct answer: 4 days1186. The relation between the decay constant 'λ' and the half-life T12 of a radioactive substance is:
- A. λ = 1/T1/2
- B. λ = 0693 T1/2
- C. λ = T1/2
- D. λ = 0.693/T1/2
Explanation: The time required for half of the original population of radioactive atoms to decay is called the half-life.
Correct answer: λ = 0.693/T1/2- A. 25g
- B. 50g
- C. 100g
- D. 200g
Explanation: After every half life, the amount of uranium halves. Following this idea, after the first half life, the amount of uranium drops from 400g…
Correct answer: 50g- A. Bones
- B. Skin
- C. Liver
- D. Thyroid gland
Explanation: Cobalt is absorbed by the small intestine to the blood and later absorbed by the liver, as it is a core element of vitamin B12…
Correct answer: Liver- A. Blurry Area
- B. Bright Area
- C. Dark Area
- D. Red Area
Explanation: Explanation:A crack allows greater amount of X-rays to pass, which appears on photographic film as dark area.
Correct answer: Dark Area- A. Severe Crop Damage
- B. Decay of Microorganisms
- C. Sunburn, Blindness, Skin Cancer
- D. All of the above
Explanation: Explanation:Ultraviolet radiation can cause severe crop damage, decay of microorganisms, sunburn, blindness, and skin cancer.
Correct answer: All of the above- A. Radon
- B. Xenon
- C. Krypton
- D. Argon
Explanation: A is correct as radan has radioactive tendencies and is used as radiation therapy for cancer patients.The alpha particles emitted by the…
Correct answer: Radon- A. kJ / mol
- B. J / mol
- C. kg / J
- D. J / kg
Explanation: The absorbed dose is the amount of energy from ionizing radiation absorbed per unit mass of a material.
Correct answer: J / kg- A. Iodine-131
- B. Phosphorous-32
- C. Strontium-90
- D. Cobalt-60
Explanation: Radioiodine, 131I, has been used for the treatment of hyperthyroidism and metastases of well-differentiated thyroid carcinoma.
Correct answer: Iodine-1311194. Sodium-24 is used for:
- A. Sterilization
- B. Study of circulation of blood
- C. Skin Cancer
- D. Thyroid Cancer
Explanation: Na-24 is a radioisotope that is used to study the circulation of blood.
Correct answer: Study of circulation of blood- A. 1 Rad
- B. 1 Sievert
- C. 1 Yellow
- D. 1 Gray
Explanation: 1 Gray is the unit of absorbed radiation equal to the dose of one joule of energy absorbed per kilogram of matter, or 100 rad.
Correct answer: 1 Gray- A. Bones reflect greater number of X-rays
- B. Bones absorb a lower amount of X-rays
- C. Bones absorb greater number of X-rays
- D. Bones totally reflect X-rays
Explanation: X-rays are a technique used in radiography in which electromagnetic radiation differentially penetrates tissues inside the body and…
Correct answer: Bones absorb greater number of X-rays- A. Iron
- B. Nickel
- C. Brass
- D. Tungsten
Explanation: Most x-ray tube anodes are made of tungsten (the target material). Tungsten has a high atomic number (Z = 74) and a high melting point of…
Correct answer: Tungsten- A. 0.01
- B. 0.001
- C. 10
- D. 100
Explanation: The correct statement is D. 0.001. The relation between gray and rad is 1 Gy = 100 rad.
Correct answer: 100- A. An electron which was existing outside the nucleus.
- B. An electron which was existing inside the nucleus.
- C. An electron emitted by the nucleus as a of the decay of neutrons inside the nucleus.
- D. A pulse of electromagnetic waves.
Explanation: An unstable atom can attain stability by radioactive decay such as alpha, beta or gamma decay.
Correct answer: An electron emitted by the nucleus as a of the decay of neutrons inside the nucleus.- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Explanation:γ radiation causes no change in the atomic mass or atomic number.
Correct answer: Option D