JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Photon and Photoelectric Effect

  • question_answer
    Photon of 5.5 eV energy fall on the surface of the metal emitting photoelectrons of maximum kinetic energy 4.0 eV. The stopping voltage required for these electrons are [Orissa (Engg.) 2002; DPMT 2004]

    A)            5.5\[V\]                                  

    B)            1.5\[V\]

    C)            9.5\[V\]                                  

    D)            4.0\[V\]

    Correct Answer: D

    Solution :

               \[{{K}_{\max }}=e{{V}_{0}}\] Þ \[e{{V}_{0}}=4eV\]Þ \[{{V}_{0}}=4V\]


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