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Why is the central electrode in a G.M. tube positive?

  1. May 14, 2015 #1
    Why is the central electrode in a Geiger-Muller tube always positive (and not negative)?

    Many thanks!
     
  2. jcsd
  3. May 14, 2015 #2

    mfb

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    Staff: Mentor

    If it would be negative, your electrons would move outwards where the field strength is too low to get charge multiplication.
     
  4. May 14, 2015 #3
    Thank you very much! I understand now :)
     
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