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