KVPY Sample Paper KVPY Stream-SX Model Paper-29

  • question_answer
    In an x-ray tube, if the accelerating potential difference is changed, then:

    A) the frequency of characteristic x - rays of a material will get changed

    B) number of electrons emitted will change

    C) the difference between \[{{\lambda }_{0}}\] (minimum wavelength) and \[{{\lambda }_{k\alpha }}\] (wavelength of \[{{k}_{\alpha }}x-ray\]) will get changed

    D) difference between \[{{\lambda }_{k\alpha }}\] and \[{{\lambda }_{k\beta }}\] will get changed.

    Correct Answer: C

    Solution :

    As the acceleration potential difference is changed only the minimum wavelength changes. It has no effect on wavelengths of characteristics x-rays (whether they are produced or not) \[\therefore \] [c] is the correct choice.

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