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 9 of 63
- A. 8 MeV per nucleon
- B. 7 MeV per nucleon
- C. 6 MeV per nucleon
- D. 9 MeV per nucleon
Explanation: The reason why the binding energy per nucleon peaks at around 8.75 MeV for Fe-56 is because Fe-56 has the optimal ratio of protons to…
Correct answer: 8 MeV per nucleon- A. 50 - 60
- B. 100-150
- C. 150 - 200
- D. 200-235
Explanation: The nuclei have maximum binding energy per nucleon whose mass number lies between 50 and 60.
Correct answer: 50 - 60- A. Photons
- B. Leptons
- C. Mesons
- D. Baryons
Explanation: Baryons are also composite particles and include protons and neutrons. They consist of three quarks (or three antiquarks).
Correct answer: Baryons- A. Alpha particle.
- B. Beta particle.
- C. Neutron.
- D. Proton.
Explanation: The nuclear reaction involves two deuterium nuclei (1H2) fusing to form a helium-3 nucleus (2He3) and a neutron.
Correct answer: Neutron.- A. Magnetic force
- B. Gravitational force
- C. Weak nuclear force
- D. Strong nuclear force
Explanation: The correct answer is the strong nuclear force. It is the strongest of the four fundamental forces and acts between nucleons (protons and…
Correct answer: Strong nuclear force- A. 12.5 g
- B. 25 g
- C. 50 g
- D. 100 g
Explanation: To calculate the amount of uranium left after three half-lives, you can use the formula:Final amount=Initial amount×(1/2 )number of…
Correct answer: 50 g- A. 30 days
- B. 20 days
- C. 15 days
- D. 12 days
Explanation: As: N=N0 ×(1/2)t/TGiven that N/N0 =1/32 and t=60 days, we can substitute these values into the equation: 1/32=(1/2)60/TTaking the natural…
Correct answer: 12 days- A. After 1/2 minutes, 1/4 of the isotope remain
- B. After 1 minute, 1/4 of the isotope remain
- C. After 4 minute, 1/4 of the isotope remain
- D. After 4 minute, none of the isotope remain
Explanation: As the Half life is 2 min and the original qunatity of isotopes is 1/2 when we double the time then multiply the half of the new time time…
Correct answer: After 4 minute, 1/4 of the isotope remain- A. After 1/2 minutes, 1/4 of the isotope remain
- B. After 1 minute, 1/4 of the isotope remains
- C. After 4 minutes, 1/4 of the isotope remains
- D. After 4 minute, none of the isotope remain
Explanation: As the half-life is 2 min and the original quantity of isotopes is 1/2, when we double the time,e then multiply the half-life of the new…
Correct answer: After 4 minutes, 1/4 of the isotope remains- A. λ = T1/2
- B. T1/2 = 0.693/λ
- C. λ = T1/2/0.693
- D. λ = T1/2 x 0.693
Explanation: The relationship between the decay constant (λ) and the half-life (T₁/₂) is given by the following equation:T₁/₂ = ln(2) / λ Where:T₁/₂ is…
Correct answer: T1/2 = 0.693/λ- A. 1240 years
- B. 1620 years
- C. 2000 years
- D. 63 years
Explanation: T1/2 = 0.693/ λ = 0.693/(4.28 x 10-4)T 1/2 = 1620 years
Correct answer: 1620 years- A. 1/32No
- B. No/31-No/32
- C. 31/32No
- D. No/32-No/31
Explanation: Np/No = (2n - 1)/ 2n= (25 - 1)/25 = 31/32
Correct answer: 31/32No- A. 0.001 s-1
- B. 0.01 s-1
- C. 0.1 s-1
- D. 1 s-1
Explanation: According to the formula λ=ln(2)/T1/2 =0.693/0.693 =1s-1This is Official Federal MDCAT 2024 question, the question statement and it's…
Correct answer: 1 s-1- A. 1mSv
- B. 1mGy
- C. 1Gy
- D. 1Sv
Explanation: 1 Sv (sievert) is huge - it represents 1000 mSv. A sudden dose of 1 Sv can cause radiation sickness.Background radiation that an average…
Correct answer: 1mSv175. One rem is equal to:
- A. 0.01 Gy / RBE
- B. 0.01 Sv × RBE
- C. 0.01 RBE
- D. 0.01 Cy
Explanation: One rem is equal to 0.01 sievert (Sv) multiplied by the Relative Biological Effectiveness (RBE) factor.
Correct answer: 0.01 Sv × RBE- A. Zener effect
- B. Biological effect
- C. Somatic effect
- D. Genetic effect
Explanation: These effects such as skin burn, loss of hair, drop in white blood cells, and induction of cancer are examples of the somatic effects of…
Correct answer: Somatic effect- A. Chlorine-36
- B. Cobalt-60
- C. Iodine-131
- D. Radium-226
Explanation: Iodine-131 is used in the diagnosis and treatment of thyroid disorders, particularly hyperthyroidism and thyroid cancer.
Correct answer: Iodine-131- A. sterilisation of food.
- B. validation of expiry date.
- C. improving cooking process.
- D. increasing the shelf life of food.
Explanation: A) sterilisation of food: This is correct. X-rays are a type of ionizing radiation used in food irradiation to kill pathogens and…
Correct answer: sterilisation of food.- A. cancer.
- B. kidney stones.
- C. spinal dislocation.
- D. nervous breakdown.
Explanation: Nuclear radiation therapy, also known as radiation therapy or radiotherapy, is a treatment that uses high doses of radiation to kill…
Correct answer: cancer.- A. Cobalt-60.
- B. Iodine-131.
- C. Carbon-14.
- D. Strontium-90.
Explanation: The correct answer is Iodine-131. This isotope is highly effective in the treatment of thyroid-related conditions because the thyroid…
Correct answer: Iodine-131.