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AMU Medical AMU Solved Paper-2003

  • question_answer
    The correct graph representing the relation between energy (E) of photoelectrons and frequency v of incident light is

    A)

    B)

    C)

    D)  

    Correct Answer: B

    Solution :

                     From Einsteins photoelectric equation, the kinetic energy (KE) of electrons is KE = hv - W             ? (i) where W is work function, h the Plancks constant and v the frequency of light Also, equation of straight line is                                                                                                                        \[y=mx+c\]  ... (ii) where m is slope, c the constant. Comparing Eqs. (i) and (ii), we get that graph of E versus v is a straight line of positive slope, cutting the energy axis towards negative.


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