KVPY Sample Paper KVPY Stream-SX Model Paper-25

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 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.