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JEE Main & Advanced Physics Atomic Physics Question Bank Self Evaluation Test - Atoms

  • question_answer
    According to Bohr's theory, the time averaged magnetic field at the center (i.e. nucleus) of a hydrogen atom due to the motion of electrons in the nth orbit is proportional to : (n = principal quantum number)

    A)  \[{{n}^{-4}}\] 

    B)  \[{{n}^{-5}}\]  

    C)  \[{{n}^{-3}}\] 

    D)  \[{{n}^{-2}}\]

    Correct Answer: D

    Solution :

    [d] Magnetic field at the centre of nucleus of H-atom, \[B=\frac{{{\mu }_{0}}I}{2r}\]                                      ?.(i) According to Bohr's model, radius of orbit \[r\propto {{n}^{2}}\] eq. (i) we can also write as \[B\propto {{n}^{-2}}\]


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