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

  • question_answer
    According to Einstein's photoelectric equation, the graph between the kinetic energy of photoelectrons ejected and the frequency of incident radiation is     [MP PMT 1994; CBSE PMT 1996; CBSE PMT 2004]

    A)                                  

    B)                          

    C)                                  

    D)

    Correct Answer: D

    Solution :

               According to Einstein equation                    \[h\nu =h{{\nu }_{0}}+{{K}_{\max }}\] Þ \[{{K}_{\max }}=h\nu -h{{\nu }_{0}}\]on comparing it with \[y=mx+c,\] it is clear to say that,                    This is the equation of straight line having positive slope (h) and negative intercept \[(h{{\nu }_{0}})\] on KE axis.


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