When the exposure switch at the operating console is first depressed:

Question

Quizplus · Accepted Answer

When the exposure switch at the operating console is first depressed, both the anode starts rotating and thermionic emission is achieved. The rotation of the anode helps to distribute the heat generated during x-ray production, while thermionic emission from the cathode provides the electrons necessary for x-ray production when they are accelerated towards the anode.

When the Exposure Switch at the Operating Console Is First