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Nuclei Test - 6...

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  • Question 1
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    Binding energy per nucleon vs. mass number curve for nuclei is shown in fig. W, X, Y and Z are four nuclei indicated on the curve. The process that would release energy is

  • Question 2
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    Biding energy is equal to: (m is the mass defect in amu)

  • Question 3
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    The binding energies per nucleon for a deuteron and an  -particle are  $${ x }_{ 1} ,{ x}_{ 2 }$$ respectively. What will be the energy Q released in the reaction $$_{ 1 }^{ }{ { H }_{ }^{ 2 } }+_{ 1 }^{ }{ { H }_{ }^{ 2 } }\rightarrow _{ 2 }^{ }{ { He }_{ }^{ 4 } }+Q$$

  • Question 4
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    The rest energy of an electron is $$0.511 MeV.$$ The electron is accelerated from rest to a velocity $$0.5 c$$. The change in its energy will be

  • Question 5
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    Results of calculations for four different designs of a fusion reactor using D-D reaction are given below. Which of these is most promising based on Lawson criterion?

  • Question 6
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    Assume that two deutron nuclei in the core of fusion reactor at temperature $$T$$ are moving towards each other,each with kinetic energy $$1.5kT$$, when the separation between them is large enough to neglect Coulomb potential energy. Also neglect any interaction from other particles in the core. The minimum temperature $$T$$ required for them to reach a separation of $$4\times { 10 }^{ -15 }$$m is in the range

  • Question 7
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    Directions For Questions

    Some of the heavy nuclei decay into lighter nuclei by emitting a-particle and acquire stability. The principles of conservation of atomic number, mass number, linear momentum and energy (including rest mass energy) are valid for these decays.
    A stationary nucleus $$^{226}_{88}Ra$$ (ground state) decays into the nucleus $$^{222}_{86}Rn$$ (ground state) by emitting an $$\alpha - particle$$.
    Given that $$m(^{226}_{88}Ra)=226.02540 u$$. $$m(^4_2He)=4.00260 u$$. $$m(^{222}_{86}Rn)=222.01750 u$$.

    ...view full instructions

    The Q-value for the $$\alpha-decay$$ of $$^{226}_{88}Ra$$ is (approximately)

  • Question 8
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    Which of the following nuclear reactions is not possible?

  • Question 9
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    The velocity of a body of rest mass $$m_o$$ is $$\dfrac{\sqrt 3}{2} c$$ (where c is the velocity of light in vacuum). The mass of this body is : 

  • Question 10
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    Calculate the binding energy of $$_{3}^{6}\textrm{Li}$$ assuming the mass of $$_{3}^{6}\textrm{Li}$$ atom as $$6.01512$$ amu:

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