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AMU Medical AMU Solved Paper-2001

  • question_answer
    The ionisation potential of hydrogen atom is 13.6 V. The energy needed to ionise a hydrogen atom which is in its n = 2 state is about

    A)  3.4 eV                                 

    B)  1.5 eV

    C)  10.2 eV                               

    D)  13.6 eV

    Correct Answer: A

    Solution :

                     The energy (E) needed to ionise in its \[{{n}^{th}}\]excited state is                 \[{{E}_{n}}=-\frac{13.6}{{{n}^{2}}}\] Given,   n = 2 \[\therefore \]  \[{{E}_{n}}=-\frac{13.6}{{{2}^{2}}}=-3.4\,eV\]


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