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

  • question_answer
    X-rays are produced by accelerating electrons by voltage V and let they strike a metal of atomic number Z. The highest frequency of X-rays produced is proportional to [UPSEAT 2004]

    A)            V    

    B)            Z

    C)            (Z ? 1)                                     

    D)            \[{{(Z-1)}^{2}}\]

    Correct Answer: D

    Solution :

                       According to Mosley?s law \[\nu \,\propto {{(Z-b\,)}^{2}}\]            For \[{{k}_{\alpha }}\] line, \[b=1,\] and it has maximum frequency so \[{{\nu }_{\max }}\,\propto {{(Z-1)}^{2}}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner