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Cathode ray tube ?

  1. Mar 31, 2010 #1
    When my Tv shoots electrons from the cathode ray tube , where do these electrons come from and is it ionizing whatever they come from.
  2. jcsd
  3. Mar 31, 2010 #2


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    The came from a filament. The electrons are ejected via thermionic emission.

    It is not ionizing for the filament. The filament is connected to ground.

  4. Mar 31, 2010 #3
    ok thanks for the answer , so then are the electrons cycled back through the circuit somehow
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