Nuclear physics questions with solutions

Showing 1–10 of 297 questions

• MCQeasyNuclear physicsNuclear Properties, Mass Defect & Binding Energy

  Two nuclei have mass numbers in the ratio 1 : 3. The ratio of their nuclear densities is:

  Options

  • Option A

    1 : 3

  • Option B

    3 : 1

  • Option C

    (3)¹ᐟ³ : 1

  • Option D

    1 : 1

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• Multi-correctmediumNuclear physicsNuclear Properties, Mass Defect & Binding Energy

  Which of the following statement(s) is/are correct?. Image

  Select all that apply

  • Option A

    The rest mass of a stable nucleus is less than the sum of the rest masses of its separated nucleons.

  • Option B

    The rest mass of a stable nucleus is greater than the sum of the rest masses of its separated nucleons.

  • Option C

    In nuclear fusion, energy is released by fusion of two nuclei of medium mass (approx. 100 amu)

  • Option D

    In nuclear fusion, energy is released by fragmentation of a very heavy nucleus.

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• NumericeasyNuclear physicsNuclear Fission, Fusion & Nuclear Reactors

  The average energy released per fission for the nucleus of ²³⁵₉₂U is 190 MeV. When all the atoms of 47 g pure ²³⁵₉₂U undergo fission process, the energy released is α × 10²³ MeV. The value of α is _______.

  (Avogadro Number = 6 × 10²³ per mole)

  Your answer

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• NumericmediumNuclear physicsRadioactivity & Radioactive Decay Law

  A radioactive element ²⁴²₉₂X emits two α-particles, one electron and two positrons. The product nucleus is represented by ²³⁴ₚY. The value of P is ____.

  Your answer

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• MCQmediumNuclear physicsRadioactivity & Radioactive Decay Law

  The half-life of a radioactive nucleus is 5 years. The fraction of the original sample that decays in 15 years is:

  Options

  • Option A

    $\frac{3}{4}$

  • Option B

    1/8

  • Option C

    7/8

  • Option D

    1/4

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• MCQeasyNuclear physicsRadioactivity & Radioactive Decay Law

  A heavy nucleus Q of half-life 20 min decays by α emission with probability 60% and β emission with probability 40%. Initially there are 1000 Q nuclei. How many α decays occur in the first hour?

  Options

  • Option A

    50

  • Option B

    75

  • Option C

    350

  • Option D

    525

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• MCQmediumNuclear physicsRadioactivity & Radioactive Decay Law

  A radioactive nucleus has mean life τ. What is the probability that it survives up to time τ but decays before time 3τ?

  Options

  • Option A

    0.050

  • Option B

    0.135

  • Option C

    0.318

  • Option D

    0.632

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• MCQmediumNuclear physicsRadioactivity & Radioactive Decay Law

  A nucleus of mass M+Δm at rest decays into two daughter nuclei of masses M/4 and 3M/4. Find the speed of the daughter of mass M/4, assuming non-relativistic motion.

  Options

  • Option A

    c√[Δm/(M+Δm)]

  • Option B

    c√[Δm/(M+Δm)]

  • Option C

    c√(2Δm/M)

  • Option D

    c√(6Δm/M)

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• MCQeasyNuclear physicsNuclear Properties, Mass Defect & Binding Energy

  The binding energy of a nucleus is equal to:

  Options

  • Option A

    The energy needed to remove one neutron only

  • Option B

    The total kinetic energy of nucleons inside the nucleus

  • Option C

    The energy required to separate the nucleus completely into free protons and neutrons

  • Option D

    The rest energy of the nucleus

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• MCQmediumNuclear physicsNuclear Properties, Mass Defect & Binding Energy

  In a nuclear fission reaction of an isotope of mass M, three similar daughter nuclei of same mass are formed. The speed of a daughter nuclei in terms of mass defect ΔM will be :

  Options

  • Option A

    √(2cΔM/M)

  • Option B

    ΔMc²/3

  • Option C

    c√(2ΔM/M)

  • Option D

    c√(3ΔM/M)

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