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

  • question_answer
    A photon of energy 3.4 eV is incident on a metal having work function 2 eV. The maximum K.E. of photo-electrons is equal to                                                     [MP PET 1991]

    A)            1.4 eV                                      

    B)            1.7 eV

    C)            5.4 eV                                      

    D)            6.8 eV

    Correct Answer: A

    Solution :

               0.\[{{K}_{\max }}=(E-{{W}_{0}})=(3.4-2)\ eV=1.4\ eV\]


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