American Society of Radiologic Technologist (ASRT) Practice Exam

Question: 1 / 400

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

anode

focusing cup

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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