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..

c. rb

explanation:

the atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons.

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)