• # 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.

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.