CET Karnataka Medical CET - Karnataka Medical Solved Paper-2007

  • question_answer
    Which one of the following graph represents the variation of maximum kinetic energy \[\left( {{E}_{k}} \right)\] of the emitted electrons with frequency v in photoelectric effect correctly?

    A)   

    B)  

    C)   

    D)  

    Correct Answer: D

    Solution :

    According to photoelectric equation \[{{E}_{k}}=hv-h{{v}_{0}}\] If the energy of photon (Tv) is less than the work function \[(h{{v}_{0}})\]of metallic surface, then electrons will never be ejected from surface regardless of intensity of incident light. Also, from Eq. (i), when \[{{E}_{A}}=h{{v}_{A}}\] \[\therefore \]Graph represents variation of \[{{E}_{k}}\] with v.


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