INBDE (Integrated National Board Dental Examination) Practice Exam

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Ace your INBDE with our comprehensive practice exam. Featuring detailed explanations, interactive flashcards, and a wide array of multiple-choice questions designed to mirror the real test. Get ready to surpass your expectations!

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What component is responsible for generating electrons in dental radiography?

Negative cathode
Positive anode
X-ray tube
Film holder

The correct answer is: Negative cathode

The correct answer is the negative cathode. In dental radiography, electrons are generated through a process called thermionic emission in the x-ray tube. The negative cathode contains a filament that is heated, causing the release of electrons through a process known as thermionic emission. These electrons are then accelerated towards the positive anode when a high voltage is applied, leading to the production of X-rays. The positive anode plays a role in attracting the electrons, but it is not responsible for their generation. The x-ray tube is where the entire process of X-ray generation occurs, with the negative cathode being the source of the electrons. The film holder, on the other hand, is used to stabilize and position the dental film during exposure but is not directly involved in the generation of electrons.