Registered Cardiovascular Invasive Specialist (RCIS) Practice Test

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Prepare for the Registered Cardiovascular Invasive Specialist (RCIS) Exam. Utilize flashcards and multiple-choice questions with detailed explanations. Ace your exam with confidence!

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

Cathode: negative, Anode: positive
Cathode: positive, Anode: negative
Cathode: neutral, Anode: positive
Cathode: negative, Anode: neutral

The correct answer is: Cathode: positive, Anode: negative

In an X-ray tube, the cathode is indeed negatively charged while the anode carries a positive charge. This arrangement is crucial for the functioning of the tube, as electrons are emitted from the cathode and directed towards the anode. When high voltage is applied across the electrodes, it accelerates the electrons towards the anode, where they interact with the target material to produce X-rays. The negative charge of the cathode is due to the heated filament that emits electrons via thermionic emission. These electrons then travel towards the positively charged anode, which attracts them because of its positive potential. This flow of electrons leads to the generation of X-rays upon their impact with the anode material, typically made of tungsten due to its high atomic number and suitable melting point. Understanding this charge distinction is essential for comprehending how X-ray tubes operate and the fundamental principles of electron movement and X-ray production.