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JEE Main & Advanced Physics Atomic Physics Question Bank Atomic Structure

  • question_answer
    When a hydrogen atom is raised from the ground state to an excited state [CBSE PMT 1995; AMU (Med.) 1999]

    A)            P.E. increases and K.E. decreases

    B)            P.E. decreases and K.E. increases

    C)            Both kinetic energy and potential energy increase

    D)            Both K.E. and P.E. decrease

    Correct Answer: A

    Solution :

                       P.E.\[\propto -\frac{1}{r}\] and K.E.\[\propto \frac{1}{r}\]                    As r increases so K.E. decreases but P.E. increases.


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