CSIR NET Angular momentum in Atomic Physics — Previous Year Questions

All Angular momentum in Atomic Physics questions (CSIR NET)

1. Q1.

   2020 June

   Single correct option

   CSIR_2020_June_Q66

   If we take the nuclear spin I into account, the total angular momentum is $\overrightarrow{\mathrm{F}}=\overrightarrow{\mathrm{L}}+\overrightarrow{\mathrm{S}}+\overrightarrow{\mathrm{I}}$, where $\overrightarrow{\mathrm{L}}$ and $\overrightarrow{\mathrm{S}}$ are the orbital and spin angular momenta of the electron. The Hamiltonian of the hydrogen atom is corrected by the additional interaction $\lambda \overrightarrow{\mathrm{I}}\cdot (\overrightarrow{\mathrm{L}}+\overrightarrow{\mathrm{S}})$, where $\lambda >0$ is a constant. The total angular momentum quantum number F of the p - orbital state with the lowest energy is
   

   1. A.
      0
   2. B.
      1
   3. C.
      1/2
   4. D.
      3/2

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2. Q2.

   2019 June

   Single correct option

   CSIR_2019_June_Q69

   

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3. Q3.

   2018 June

   Single correct option

   CSIR_2018_June_Q68

   

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