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 41 of 63
- A. Straight, thick, short
- B. Thin, wavy, shorter
- C. Thin, wavy, longer
- D. Thin, straight, short
Explanation: Beta particles form thin and discontinuous tracks extending (long) in an erratic manner showing frequent deflections (wavy).
Correct answer: Thin, wavy, longer- A. Alpha
- B. Gamma
- C. Beta
- D. All have same penetration power
Explanation: Gamma rays have the strongest penetrating power, beta radiation has the 2nd strongest and alpha is the least penetrating.
Correct answer: Gamma- A. Decreases in 'Z' by 4 and decreases in 'A' by 2
- B. Decreases in 'A' by 1 and 'Z' remains same
- C. Decreases in 'Z' by 1 and 'A' remains same
- D. Decreases in 'A' by 4 and decreases in 'Z' by 2
Explanation: The 'A' (atomic mass) of an alpha particle is 4 and the 'Z' (atomic number) is 2.
Correct answer: Decreases in 'A' by 4 and decreases in 'Z' by 2- A. 1 gray
- B. 1000 gray
- C. 0 gray
- D. 100 gray
Explanation: Given:Energy = E = 10 JMass = m = 10 g = 0.01 kgAbsorbed dose = ?Formula:As we know that:Absorbed dose = Energy / mass = 10 / 0.01 = 1000…
Correct answer: 1000 gray- A. Same mass number but different atomic number
- B. Same mass number as well as atomic number
- C. Different mass number as well as atomic number
- D. Same atomic number but different mass number
Explanation: The isotopes of an element have the same number of protons and electrons, but different numbers of neutrons.
Correct answer: Same atomic number but different mass number- A. Alpha
- B. Gamma
- C. Beta
- D. Photons
Explanation: Since the atomic mass is reduced by 2 and the atomic number is reduced by 1, beta emission has taken place along with emission of two…
Correct answer: Beta- A. Dependent on both temperature and pressure
- B. Independent of temperature but dependent on pressure
- C. Independent of both temperature and pressure
- D. Independent of pressure but dependent on temperature
Explanation: Emission of radiation from radioactive substance is a spontaneous process and it is independent of both temperature and pressure.
Correct answer: Independent of both temperature and pressure- A. 4800 years
- B. 6400 years
- C. 2400 years
- D. 3200 years
Explanation: According to the formula:N=N0(½)nN0 = Initial amountN= Remaining amountn= number of half-livesN=N0(½)n = N/N0=(½)n=25/100=(½)nn=2To reduce…
Correct answer: 3200 years- A. α
- B. β
- C. γ
- D. Neutron
Explanation: Alpha particles have the highest ionization power than the other two types of radiation owing to the fact that an 𝝰-particle is a doubly…
Correct answer: α- A. u u u
- B. u u d
- C. u d d
- D. d d
Explanation: Quarks are fundamental and elementary particles, there are six flavors of quarks =up, down, top, bottom, charm, and strange.Down, bottom…
Correct answer: u d d- A. Electron
- B. Hadron
- C. Neutron
- D. Proton
Explanation: •An electron is a kind of lepton which is considered a fundamental or elementary particle because they are not further divisible.•Hadrons…
Correct answer: Electron- A. An antineutrino
- B. An electron
- C. A neutrino
- D. A positron
Explanation: Antineutrinos are produced in nuclear beta decay together with a beta particle (in beta decay a neutron decays into a proton, electron…
Correct answer: An antineutrino- A. 2.9 x 10^7𝑠
- B. 1.3 x 10^7𝑠
- C. 1.2 × 10−8 𝑠
- D. 3.4 × 10−8𝑠
Explanation: Using the following formulaT1/2= 0.693/decay constant
Correct answer: 2.9 x 10^7𝑠- A. 6 days
- B. 8 days
- C. 12 days
- D. 16 days
Explanation: 50% in 3 days 25% in 6 days 12.5% in 9 days 6.25% in 12 days
Correct answer: 12 days- A. 1 MeV
- B. 2 MeV
- C. 4 MeV
- D. 8 MeV
Explanation: For a particle that is accelerated, its KE equals VqApplying the formula,KE= Vq AND M=106KE= (106) (2e)KE= 2MeVOption A, C and D give…
Correct answer: 2 MeV- A. v=(A/4-1)u
- B. v=(A-1)u
- C. v=Au
- D. v=(A+1)u
Explanation: D P=v, N=u, AAccording to the law of conservation of momentum, P(initial)= P(final)Pi is zero because system is at rest but Pf is equal to…
Correct answer: v=(A-1)u- A. 12.5%
- B. 87.5%
- C. 8.5%
- D. 25.1%
Explanation: 𝑁=𝑁0(1/2)𝑡𝑇1/21-1/No=1-(½)3*60/60=⅞⅞*100=86.5%.
Correct answer: 87.5%- A. Radiation
- B. Light
- C. Current
- D. None of these options are correct
Explanation: Radiation is used to detect leakages in water pipes.There are two main types of radiation that are used to detect water leaks:Radioactive…
Correct answer: Radiation- A. Hydrogen
- B. Deuterium
- C. Tritium
- D. Helium
- E. Lithium
Explanation: Alpha particle has charge of +2e and mass no 4Hydrogen has a charge of +e and mass no 1Deutrium has charge of +e and mass no 2Tritrium has…
Correct answer: Helium- A. 1.6 x 10^-27 C
- B. Zero
- C. 1.6 x 10^-31 C
- D. 9.11 x 10^-19 C
- E. 9.6 x 10^-15C
Explanation: A neutron is an electrically neutral sub-atomic particle. Therfore, it has no charge.
Correct answer: Zero