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 35 of 63
- A. thermal radiation
- B. cosmic radiation
- C. electromagnetic radiation
- D. non-electromagnetic radiation
Explanation: Carl Anderson was studying the showers of cosmic particles and discovered positrons in 1932.
Correct answer: cosmic radiation- A. 10.2 h
- B. 11.2 h
- C. 14.2 h
- D. 12.2 h
Explanation: From law of radioactivity, N = Noe^-(lamda)(t) Here decay constant = 0.693/ t ½ = 0.693/110Decay constant (lamda) = 0.0063min^-Let No =…
Correct answer: 12.2 h- A. Ozone
- B. Hydrogen
- C. Sodium
- D. All of these options are not radioactive
Explanation: Neither of the options are radioactive; the correct answer is D. The image shows the radioactive elements highlighted in the periodic table.
Correct answer: All of these options are not radioactive- A. Radioactive nucleus
- B. Innermost electron orbit
- C. A stable nucleus
- D. Outer-most electron orbit
Explanation: A beta particle is emitted from the nucleus of an atom during radioactive decay.
Correct answer: Radioactive nucleus- A. Blue
- B. Red
- C. Orange
- D. Green
Explanation: The hottest stars tend to appear blue or blue-white, whereas the coolest stars are red.
Correct answer: Blue- A. Few muinutes
- B. Few weeks
- C. Few days
- D. More than 90 years
Explanation: It takes around 10 seconds for the fireball from a nuclear explosion to reach its maximum size, but the effects last for decades and span…
Correct answer: More than 90 years- A. Gray
- B. Roentgen
- C. Curie
- D. Rem
Explanation: Radiations absorbed dose and effective dose in the international system of units (SI system) for radiation measurement use "gray" (Gy) and…
Correct answer: Gray- A. +1
- B. -1
- C. 0
- D. All of these options are correct
Explanation: The great penetrating power of gamma rays stems from the fact that they have no electric charge and thus do not interact with matter as…
Correct answer: 0- A. Fuel
- B. Nuclear medicine
- C. Crops fertlization
- D. None of these options are correct
Explanation: Radioactive waste is a type of hazardous waste that contains radioactive material.
Correct answer: None of these options are correct- A. Charged particles
- B. Uncharged particles
- C. Neutrons
- D. All of these options are correct
Explanation: Atoms are electrically neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged).
Correct answer: Charged particles- A. Nuclear bomb experiment
- B. Chemical reaction experiment
- C. Scattering experiment
- D. None of these
Explanation: Option A : X-rays are not discovered in nuclear bomb experiments. Option B : X-rays are not discovered in chemical reaction…
Correct answer: Scattering experiment- A. Excitations
- B. De-excitations
- C. Magnetization
- D. None of these
Explanation: Option: A The combination of velocity-dependent friction and variable normal force can lead to parametrically excited instability.
Correct answer: Excitations- A. 238U
- B. 234U
- C. 237U
- D. None of these
Explanation: Gamma rays have no charge as well as no mass. So, If a nucleus releases gamma rays irrespective of how many gamma rays, its mass will…
Correct answer: 238U- A. 104Bq
- B. 106Bq
- C. 107Bq
- D. 108Bq
Explanation: One rutherford was equivalent to 1,000,000 nuclear disintegrations per second, or alternatively one becquerel equated to one…
Correct answer: 106Bq- A. Alpha rays
- B. Beta rays
- C. X-rays
- D. Gamma rays
Explanation: Alpha particles are essentially helium nuclei with two protons and two neutrons bound together.
Correct answer: Alpha rays696. For an unknown element X the wavelength recorded is 2.9x10A-2 m, the half life of element is _ years
- A. 50
- B. 100
- C. 1000
- D. None of thses
Explanation: None of the given answer is correct so option D is appropriate.As this is a numerical thus only one option is correct.
Correct answer: None of thses- A. One particle, one anti particle
- B. Total annihilation
- C. One antiparticle only
- D. None of these
Explanation: b) Total annihilation (Option b):Option (b) "Total annihilation" is the correct answer.
Correct answer: Total annihilation- A. Reducing the neutron speed.
- B. Increasing the neutron's speed
- C. Increasing the electron speed
- D. Decreasing the electron speed.
Explanation: The moderator helps slow down the neutrons produced by fission to sustain the chain reaction.
Correct answer: Reducing the neutron speed.- A. Reflection
- B. Refraction
- C. Diffraction
- D. None of these
Explanation: Scattering is, in physics, a change in the direction of motion of a particle because of a collision with another particle.
Correct answer: None of these- A. Alpha
- B. Beta
- C. Gamma
- D. All of these
Explanation: All of the energy from the Sun that reaches the Earth arrives as solar radiation, part of a large collection of energy called the…
Correct answer: Gamma