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JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Graphical Questions

  • question_answer
               For a photoelectric cell the graph showing the variation of cut of voltage (Vo) with frequency (n) of incident light is best represented by                                   [DCE 2001; MP PET 2003]

    A)                                     

    B)                             

    C)                                 

    D)                    

    Correct Answer: D

    Solution :

                       According to Einstein?s equation                    hn = W0 + Kmax Þ \[{{V}_{0}}=\left( \frac{h}{e} \right)\,\nu -\frac{{{W}_{0}}}{e}\]                    This is the equation of straight line having positive slope (h/e) and intercept on \[-{{V}_{0}}\] axis, equals to \[\frac{{{W}_{0}}}{e}\]


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