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

  • question_answer
    The minimum wavelength of X-rays produced by electrons accelerated by a potential difference of volts is equal to [CPMT 1986, 88, 91; RPMT 1997; RPMT 1997, 98; MP PET 1997, 98; MP PMT 1996, 98, 2003; UPSEAT 2005]

    A)            \[\frac{eV}{hc}\]                

    B)            \[\frac{eh}{cV}\]

    C)            \[\frac{hc}{eV}\]                

    D)            \[\frac{cV}{eh}\]

    Correct Answer: C

    Solution :

               \[E=eV=h{{\nu }_{\max }}=\frac{hc}{{{\lambda }_{\min }}}\] \[\Rightarrow \,\,{{\lambda }_{\min }}=\frac{hc}{eV}\]


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