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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2013

  • question_answer
    An elastic with kinetic energy 5eV is incident on a H-atom in its ground state. The collision

    A)  must be elastic

    B)  may be partially elastic

    C)  may be completely elastic

    D)  may be completely inelastic

    Correct Answer: A

    Solution :

                    In hydrogen atom,\[{{E}_{2}}-{{E}_{1}}=10.2eV\]Since, energy difference is 10.2 eV, which is greater than kinetic energy 5 eV, the electron excites the hydrogen atom, hence collision is elastic.


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