When the number of electrons striking the anode of an x-ray tube is increased, the of emitted X-Rays increases.

1. density

2. frequency

When the number of electrons striking the anode of an x-ray tube is increased, the density of emitted X-Rays increases.

Option: 1

Explanation:

As the electron speed increases, the heat radiation also increases from thermionic emission, which causes more heat and more X-ray release. X-rays are produced by an a vacuum tube called X-ray tube that uses more voltage to make the electrons accelerate which the hot cathode releases to a high velocity.

This high speed electrons meets in a collision with a metal target which is the anode, and thus create the X-rays. So, the electron number available and the time period set for their release from the filament determines how many x-rays are produced from the anode. Hence, more the number of electrons striking the anode,the more is the emission of x-rays.

In a practical machine, the power output is less than the power output, this is because some of the energy while performing work,    is lost as heat energy, due to frictional forces, reducing the power output