American Society of Radiologic Technologist (ASRT) Practice Exam

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Prepare for the ASRT Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

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The negative side of the x-ray tube is known as the:

  1. anode

  2. focusing cup

  3. cathode

  4. rotor

The correct answer is: cathode

The negative side of the x-ray tube is known as the cathode. The cathode is responsible for producing electrons when heated, which are then directed toward the anode, the positive side of the x-ray tube, to produce x-rays. The cathode consists of a filament and a focusing cup. The filament is heated to incandescence, emitting electrons through thermionic emission. The focusing cup helps direct these electrons toward the anode, thereby increasing the efficiency of x-ray production. Understanding the roles of the cathode and the anode in x-ray tube operation is crucial for radiologic technologists, as it informs them about the mechanics of x-ray generation and the importance of maintaining the proper functioning of these components.

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