Nuclear physics questions with solutions

Showing 1–10 of 165 questions

• NumericmediumNuclear physicsradioactivity and law of decay

  A nucleus disintegrates into two smaller parts, which have their velocities in the ratio 3 : 2. The ratio of their nuclear sizes will be (x/3)¹ᐟ³. The value of x is :

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  JEE Mains25 January 2023Shift 2Evening Shift

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• NumericeasyNuclear physicsnuclear fission and fusion ,nuclear reactor

  The energy released per fission of nucleus of ²⁴⁰X is 200 MeV. The energy released if all the atoms in 120g of pure ²⁴⁰X undergo fission is _____ × 10²⁵ MeV. (Given Nₐ = 6 × 10²³)

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  JEE Mains24 January 2023Shift 2Evening Shift

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• NumericmediumNuclear physicsNucles and its density radius and mass defect ,binding energy and its curve

  For a carbon-12 atom, take mₕ = 1.0078 u, mₙ = 1.0087 u and M(atom) = 12.0000 u. If the mass defect is Δm = N×10⁻³ u, find N.

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• MCQmediumNuclear physicsradioactivity and law of decay

  The mass-energy difference between a neutral proton-rich parent atom and its possible daughter atom is 0.93 MeV. Neglect electron-binding energies. Which decay mode is energetically possible?

  Options

  • Option A

    β⁺ emission only

  • Option B

    Electron capture only

  • Option C

    Both β⁺ emission and electron capture

  • Option D

    Neither process

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• MCQeasyNuclear physicsnuclear fission and fusion ,nuclear reactor

  In a nuclear power station, which sequence most correctly describes the conversion of nuclear energy into electrical energy?

  Options

  • Option A

    Nuclear energy → reactor heat → steam or working-fluid motion → turbine mechanical energy → electrical energy

  • Option B

    Nuclear energy → electrical energy directly inside the uranium nucleus

  • Option C

    Nuclear energy → chemical energy → electrical energy

  • Option D

    Neutron energy → electron mass → nuclear energy

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• MCQmediumNuclear physicsradioactivity and law of decay

  A radioactive nucleus ²⁵²₉₈X, initially in its ground state, undergoes the following sequence: it emits three α-particles, then two β⁻-particles, then one β⁺-particle, and finally one γ-photon. No other particles are emitted. Which pair gives the mass number A and atomic number Z of the final daughter nucleus?

  Options

  • Option A

    A = 240, Z = 91

  • Option B

    A = 240, Z = 93

  • Option C

    A = 244, Z = 93

  • Option D

    A = 240, Z = 92

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• MCQeasyNuclear physicsnuclear fission and fusion ,nuclear reactor

  A reactor produces 3000 MW of thermal power and supplies 1000 MW of electrical power to the grid. What is its overall thermal-to-electrical efficiency?

  Options

  • Option A

    20%

  • Option B

    25%

  • Option C

    33.3%

  • Option D

    66.7%

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• MCQeasyNuclear physicsnuclear fission and fusion ,nuclear reactor

  In a hypothetical fission reaction

  ²³⁶₉₂X → ¹⁴¹₅₆Y + ⁹²₃₆Z + 3R

  The identity of emitted particles (R) is:

  Options

  • Option A

    Proton

  • Option B

    Electron

  • Option C

    Neutron

  • Option D

    γ-radiations

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  JEE Mains 2024 08 Apr Evening Shift

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• MCQmediumNuclear physicsNucles and its density radius and mass defect ,binding energy and its curve

  A fusion reaction of suitable light nuclei releases energy primarily because:

  Options

  • Option A

    The total number of nucleons decreases

  • Option B

    The product nucleus has greater binding energy per nucleon

  • Option C

    The product nucleus necessarily has a larger radius

  • Option D

    The nuclear density becomes zero

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• NumericeasyNuclear physicsnuclear fission and fusion ,nuclear reactor

  In a nuclear fission process, a high mass nuclide (A ≈ 236) with binding energy 7.6 MeV/Nucleon dissociated into middle mass nuclides (A ≈ 118), having binding energy of 8.6 MeV/Nucleon. The energy released in the process would be ____ MeV.

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