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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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Composition of Atomic NucleiRadioactive DecayHalf-life and Rate of DecayBiological and Medical Uses of Radiation
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1,254 questions · page 25 of 63

481. Energy emitted when one atom of 92U235 undergoes fission reaction is:

  • A. 150 Mev
  • B. 70 Mev
  • C. 200 Mev
  • D. 300 Mev

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Correct answer: 200 Mev

482. The process of nuclear fission was explained by:

  • A. Lies Meitner
  • B. Stressman and Hann
  • C. Bohr and Hahn
  • D. None of these

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Correct answer: Stressman and Hann

483. During fission process, a large amount of:

  • A. Light energy is produced
  • B. Heat energy is released
  • C. Nuclear energy is released
  • D. None of these

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Correct answer: Heat energy is released

484. The energy released during fission process is controlled in:

  • A. Nuclear reactor
  • B. Cyclotron
  • C. Van de Graff generator
  • D. None of these

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Correct answer: Nuclear reactor

485. The moderator used in a nuclear reactor is:

  • A. Uranium
  • B. Sodium
  • C. Aluminum
  • D. Graphite

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Correct answer: Graphite

486. The first atomic reactor was introduced by:

  • A. Currie
  • B. Enrico Fermi
  • C. Newton
  • D. Bohr

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Correct answer: Enrico Fermi

487. The total energy transferred to a body by means of radiation is measured is units of:

  • A. Rontgens
  • B. Rutherford's
  • C. Curies
  • D. None of these

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Correct answer: Rontgens

488. The mass of fissionable material needed for self sustaining chain reaction is called:

  • A. Atomic mass
  • B. Critical mass
  • C. Sub critical mass
  • D. None of these

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Correct answer: Critical mass

489. Uranium bomb depends on the process of:

  • A. Nuclear Fission
  • B. Nuclear Fusion
  • C. Pair production
  • D. All of above

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Correct answer: Nuclear Fission

490. The first artificially produced nuclear transmutation was studied by:

  • A. Chadwick
  • B. Rutherford
  • C. Faraday
  • D. None of these

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Correct answer: Rutherford

491. The process in which two or more lighter nuclei combine together to form heavier nuclei with release of energy is called:

  • A. Nuclear fission
  • B. Nuclear fusion
  • C. Chain reaction
  • D. None of these

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Correct answer: Nuclear fusion

492. The main source of energy in the stars and the sun is due to:

  • A. Fission reaction
  • B. Fusion reaction
  • C. Chemical reaction
  • D. None of above

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Correct answer: Fusion reaction

493. The substances which slow down the speed of neutron produced during a fission reaction are called:

  • A. Moderators
  • B. Retardants
  • C. Both (a) and (b)
  • D. None of these

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Correct answer: Moderators

494. Examples of radiation detector case:

  • A. Gorger counter
  • B. Wilson cloud chamber
  • C. Solid state detector
  • D. All of above

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Correct answer: All of above

495. Certain radiation detector makes use of the fact that super saturated vapors condense preferentially on ions this type of detector is called:

  • A. Gorger counter
  • B. Wilson cloud chamber
  • C. Solid state detector
  • D. None of these

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Correct answer: Wilson cloud chamber

496. In Wilson cloud chamber x-particle leave:

  • A. Thick and continuous
  • B. Thin and discontinuous
  • C. Thick and discontinuous
  • D. Thin and continuous

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Correct answer: Thin and discontinuous

497. In Wilson cloud chamber, β -particles leave:

  • A. Thin and continuous tracks
  • B. Thick and continuous tracks
  • C. No tracks
  • D. Thin and discontinuous tracks

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Correct answer: Thin and continuous tracks

498. In GM, counter, the cylinder is dilled with mixture of gases:

  • A. Containing He and Ne
  • B. Containing argon and alcohol
  • C. Both (a) and (b)
  • D. None of these

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Correct answer: Both (a) and (b)

499. To allow the entry of α or β particles, one end of the Geiger counter tube was a:

  • A. Thin glass window
  • B. Thin mica window
  • C. Wooden window
  • D. None of these

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Correct answer: Thin mica window

500. The counter which also provide the power to the G.M tube is called:

  • A. Chamber
  • B. Amplifier
  • C. Scalar
  • D. Vector

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Correct answer: Scalar
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