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

  • question_answer
    The binding energy of the innermost electron in tungsten is 40 keV. To produce characteristic X-rays using a tungsten target in an X-rays tube the potential difference V between the cathode and the anti-cathode should be [IIT 1985]

    A)            V< 40 kV                                

    B)            V \[\le \] 40 kV

    C)            V > 40 kV                               

    D)            V >/< 40 kV

    Correct Answer: C

    Solution :

               Applied voltage must be greater than binding energy.


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