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

  • question_answer
    The minimum wavelength of X-rays produced in a coolidge tube operated at potential difference of 40 kV is [BCECE 2003; RPET 2002, 03]

    A)            0.31 Å                                      

    B)            3.1 Å

    C)            31 Å                                         

    D)            311 Å

    Correct Answer: A

    Solution :

               \[{{\lambda }_{\min }}=\frac{12375}{40\times {{10}^{3}}}=0.309\,{\AA}\approx 0.31\,{\AA}\]


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