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Vaccum Tube Diode

  1. Nov 7, 2007 #1
    Can anyone explain me the mechanism of vaccum diode.Specifically how the electronts which are 'boiled' of the cathode behave
     
  2. jcsd
  3. Nov 7, 2007 #2

    Meir Achuz

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    They leave the cathode at low, thermal velocities.
    They are accelerated to the anode by the electric field between the anode and the cathode.
     
  4. Nov 7, 2007 #3
    why are there any space charges at all why don'e they flow towards the anode
     
  5. Nov 7, 2007 #4

    Meir Achuz

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    The space charge does flow toward the anode, but more electrons keep coming from the cathode, so there is a steady current and a constant space charge.
     
  6. Nov 7, 2007 #5
    well actually i was talking about the situation before the steady current begins then what does happen
     
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