RCIS Practice Test 2025 – All-in-One Exam Prep

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What are the charges on the cathode and the anode in an X-ray tube?

Cathode: negative, Anode: positive

In an X-ray tube, the cathode is negatively charged and the anode is positively charged. This configuration is essential for the production of X-rays. The cathode contains a filament that emits electrons when heated, creating a cloud of negative charge around it. These emitted electrons are then attracted toward the positively charged anode, where they collide with a target material, typically made of tungsten. This collision generates X-rays as a result of the sudden deceleration of the electrons.

The anode serves not only as the target for the electrons but also plays a significant role in the thermal management of the X-ray tube, as it dissipates the heat generated during the X-ray production process. Therefore, the charges on the cathode and anode are crucial for the functioning of the X-ray tube and the generation of diagnostic imaging.

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Cathode: positive, Anode: negative

Cathode: neutral, Anode: positive

Cathode: negative, Anode: neutral

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