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In which direction can electrons flow in a vacuum tube device?

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Question

In which direction can electrons flow in a vacuum tube device?

Options

  • From the anode to the cathode

  • From the cathode to the anode

  • In both directions between the cathode and anode

  • From the grid to the plate only

MCQ
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Solution

Electrons can flow only from the cathode to the anode in these devices. This one-direction flow is why they are generally called valves.

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