- #1
cragar
- 2,552
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I am reading about thermionic diodes and trying to understand how they work ,
it uses a heated cathode and the electrons are ejected from it via thermionic emission
and i could see how the electrons couldn't go the other way because it would require a large voltage to get them off of a non-heated cathode , but when the electrons are ejected from the heated cathode why would they get attracted back to that heated filament when the current flips on AC current .
Any input will be much appreciated .
it uses a heated cathode and the electrons are ejected from it via thermionic emission
and i could see how the electrons couldn't go the other way because it would require a large voltage to get them off of a non-heated cathode , but when the electrons are ejected from the heated cathode why would they get attracted back to that heated filament when the current flips on AC current .
Any input will be much appreciated .