When the speed of electrons striking the anode of an x-ray tube increases, the of the emitted x-rays increases.

When the speed of the electrons increases the Number of the emitted X rays increases.

Explanation:

As the electrons are accelerated from the cathode towards the anode, more number of X rays are emitted . As the electrons speed increases, the thermionic emission increases resulting in more heat and more number of X rays being released..

the answer should be in the picture.