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Discovery of cathode rays

  1. Oct 8, 2012 #1
    why current does not flow through gas in discharge tube at ordinary pressure?
  2. jcsd
  3. Oct 8, 2012 #2


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    Staff: Mentor

    You have to show your attempts at solving the question to receive help. This is a forum policy.
  4. Oct 8, 2012 #3


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    Gold Member

    Gases are not supposed to conduct electricity when you leave the power switch on. If it were so, you wouldn't had asked the question.

    Gases are insulators of electricity, since they can't conduct electricity as they lack free electrons or free ions.
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