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 59 of 63
- A. 10-12 m
- B. 10-20 m
- C. 10-10 m
- D. 10-15 m
Explanation: a) 10^-12 m:This option suggests that the diameter of a nucleus is 10^-12 meters.
Correct answer: 10-12 m- A. 1 and 2 only
- B. 1, 2 and 3 only
- C. 2 and 3 only
- D. 1 only
Explanation: The explanation for this question will be added soon.
Correct answer: 1, 2 and 3 only- A. 0
- B. 1
- C. 2
- D. 3
Explanation: Electrons are leptons and leptons are not composed of quarks.
Correct answer: 0- A. Protium
- B. Deuterium
- C. Tritium
- D. All of these have same momentum
Explanation: Tritium has one proton and two neutrons in its nucleus. It is the heaviest isotope of hydrogen, and hence, has the highest momentum, given…
Correct answer: Tritium- A. 1.2 fm
- B. 2.4 fm
- C. 3.6 fm
- D. 4.8 fm
Explanation: Explanation is given below. Nuclear radius, R = RoA1/3 where Ro is a constant and A is the mass number So, r Al/r Cu = A Al^⅓/ACu⅓ =…
Correct answer: 4.8 fm- A. Fission
- B. Fussion
- C. Both a and b
- D. None of these
Explanation: Fission & Fusion both reactions are examples of renewable sources of energy.
Correct answer: Both a and b- A. 125%
- B. 25%
- C. 50%
- D. 100%
Explanation: 50 days is one half life. So 100 days means 2 half lives.After every half life, the substance halves in amount.After the first half life…
Correct answer: 25%1168. A 32g phosphorus is decayed and 2g remains undecayed after 60 days. The half-life of phosphorous is:
- A. 5 days
- B. 6 days
- C. 10 days
- D. 15 days
Explanation: 1 half life = 16g 2 half life = 8g 3 half life = 4g 4 half life = 2g 60/4=15 days
Correct answer: 15 days- A. 2 days
- B. 6 days
- C. 10 days
- D. 15 days
Explanation: The time taken for half of the original population of radioactive atoms to decay is called the half-life.
Correct answer: 15 days- A. Average life
- B. Mean life
- C. Total life
- D. Half-life
Explanation: Radioactive materials consist of unstable atoms that decay over time, emitting radiation in the process.
Correct answer: Half-life- A. 2 days
- B. 6 days
- C. 10 days
- D. 15 days
Explanation: The half-life of a radioactive element is the time it takes for half of the initial quantity to decay.
Correct answer: 15 days- A. Alpha particles
- B. UV rays
- C. Gamma rays
- D. X rays
Explanation: Diagnostic techniques in nuclear medicine use radioactive tracers which emit gamma rays from within the body.
Correct answer: Gamma rays1173. 1 Gy is equal to
- A. 1 Jkg
- B. 1 JKg-1
- C. 1J-1Kg
- D. J-1 Kg-1
Explanation: One Gy is the international system of units (SI) equivalent to 100 rads, which is equal to an absorbed dose of 1 Joule/kilogram.
Correct answer: 1 JKg-11174. X-rays cannot detect;
- A. Sugar
- B. Blood pressure
- C. Cholesterol
- D. All of these options are correct
Explanation: All of these options are correct. X-rays cannot detect sugar, blood pressure, or cholesterol.
Correct answer: All of these options are correct- A. Transmitted through bones
- B. Reflected by bones
- C. Absorbed by bones
- D. Scattered by bones
Explanation: Dense bone absorbs much of the radiation while soft tissue (muscle, fat, and organs) allow more of the x-rays to pass through them.
Correct answer: Absorbed by bones- A. Definitely Alpha-rays
- B. Definitely Beta-rays
- C. Both Alpha and Beta rays
- D. Either Alpha or Beta rays
Explanation: Both alpha and beta particles are affected due to the magnetic field and so both rays may be produced, but not simultaneously.
Correct answer: Either Alpha or Beta rays- A. 6C12
- B. 6C13
- C. 6C14
- D. 6C12 , 6C14
Explanation: Carbon-14 is a radioactive isotope of carbon that is used in carbon dating, also known as radiocarbon dating.
Correct answer: 6C14- A. Paper
- B. Water
- C. Air
- D. All of these options are correct
Explanation: Beta rays have a high enough frequency, hence, energy to pass through all these mediums without being blocked
Correct answer: All of these options are correct- A. An alpha particle
- B. Proton
- C. A positive helium ion
- D. A negative helium ion
Explanation: Helium's atomic number is 2 which means a neutral helium atom has 2 protons and 2 electrons , when helium loses an electron it has 1…
Correct answer: A positive helium ion- A. Sn
- B. Ba
- C. Kr
- D. Fe
Explanation: Binding energy is the energy required to bind the nucleons inside the nucleus. Binding energy is the measure of stability.
Correct answer: Fe