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