That part of the cathode designed to direct the free electrons toward the tungsten target of the anode is called the "focal spot."

Name: That part of the cathode designed to direct the free electrons toward the tungsten target of the anode is called the "focal spot."
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Quizplus · Accepted Answer

The focal spot is the area on the anode target where electrons hit and produce X-rays, not a part of the cathode designed to direct electrons. The cathode emits electrons that are then accelerated towards the anode.

That Part of the Cathode Designed to Direct the Free