Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Electric charge, creating plasma and keeping it apart

  1. Feb 25, 2005 #1
    if you have a device similar to a stun gun, with a spark continuously jumping across the 2 contact points. electric field has to rip electrons from the air moecules leaving positive ions - creating plasma. now imagine you have a negatively charged disc nearby the device which is covered in a highly insulating material. is it practically possible to give the disc enough charge so that as the electrons are ripped from the air atoms, the disc attracts and collects the positive ions and repels the electrons and holds the positive ions not letting them escape? since the disc has a protective insulating cover, the charge cannot escape or neutralize with the positve ions so it would just hold them there. can this be done? how could you figure out how much charge the disc would need? would the maximum volume of these positive ions be significant at all compared to the size of the disc?
    Last edited: Feb 25, 2005
  2. jcsd
  3. Feb 25, 2005 #2
    Wouldn't it create a type of capacitor?

    I doubt it would be able to handle such enormous voltages.
  4. Feb 25, 2005 #3
    well i guess, sort of.
    the method to charge the disc would be like a giant capacitor

    as soon as the air molecules get ripped apart into positive ions and electrons, the electrons would get repelled away and the positive ions would be attracted and held onto by the negatively charged disc.

    my question is if you can safely and practically contain enough charge on the disc in order to hold any significant volume of positive air ions.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Electric charge, creating plasma and keeping it apart