Question

The potential difference applied to an X-ray tube is increased. As a result, in the emitted radiation:

• A. Bottom of the mirror should be at a height $85cm$
• B. the minimum wavelength increases
• C. the intensity decreases
• D. the intensity increases
• E. the minimum wavelength decreases

Answer 1

The correct option is E the minimum wavelength decreases

Upon increasing the potential difference applied to X-ray:

The energy with which the radiation is emitted is more, and

$E=\frac{hc}{\lambda }$

increases, thus the wavelength (minimum) must decrease.

The intensity depends on the number of electrons ejected, which remains unchanged.

Hence option (E) is correct