Which component supplies the electrons used to generate x-rays?

Study for the Dental Radiology Foundation Chain and Physics Test. Enhance your skills with flashcards and multiple-choice questions, complete with hints and explanations. Prepare for your success!

Multiple Choice

Which component supplies the electrons used to generate x-rays?

Electrons used to generate x-rays come from the heated tungsten filament at the cathode through thermionic emission. When the filament is heated to a high temperature, electrons gain enough energy to overcome the metal’s work function and are ejected into the tube. These electrons are then pulled toward the anode by the high voltage and collide with the tungsten target there to produce x-rays. The other components don’t supply electrons: the target at the anode is where x-rays are generated, the copper stem mainly helps dissipate heat, and the tubehead seal is simply a vacuum boundary.

Electrons used to generate x-rays come from the heated tungsten filament at the cathode through thermionic emission. When the filament is heated to a high temperature, electrons gain enough energy to overcome the metal’s work function and are ejected into the tube. These electrons are then pulled toward the anode by the high voltage and collide with the tungsten target there to produce x-rays. The other components don’t supply electrons: the target at the anode is where x-rays are generated, the copper stem mainly helps dissipate heat, and the tubehead seal is simply a vacuum boundary.

More practice questions