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

  • question_answer
    The minimum wavelength of X-ray emitted by X-rays tube is 0.4125 Å. The accelerating voltage is [BHU 2003; CPMT 2004; MP PMT 2005]

    A)            30 kV                                       

    B)            50 kV

    C)            80 kV                                       

    D)            60 kV

    Correct Answer: A

    Solution :

               \[{{\lambda }_{\min }}=\frac{12375}{V}{\AA}\,\Rightarrow \,V=\frac{12375}{0.4125}=30\,kV\]


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