The cathode provides the source of electrons to the x-ray machine because the negative side of the vacuum tube is composed of a focusing cup and filament.

Question

Quizplus · Accepted Answer

The source of electrons required for the production of x-ray energy enters the negative side of the vacuum tube via a tungsten filament. As the tungsten filament heats up , electrons are freed from the filament and accumulate in the focusing cup until the circuit is activated to send the freed electrons toward the positive side of the vacuum tube.

The Cathode Provides the Source of Electrons to the X-Ray