Dielectric vs Insulator

Discussion in 'Homework Help' started by deter_dangler, Oct 11, 2010.

  1. deter_dangler

    Thread Starter New Member

    May 19, 2010
    6
    0
    Hi Everyone,

    what is the difference between dielectric and insulator?

    Can we use Air as a medium between the two plates of the capacitor?
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    An insulator can be the dielectric of a capacitor.


    This is a quote from this page on capacitors:
    http://my.execpc.com/~endlr/index.html

    Yes, air can be a medium for a capacitor:

    [​IMG]

    figure a is an example of an air capacitor.

    This picture comes from this page:
    http://www.mikroe.com/old/books/keu/02.htm

    All these links come from the EDUCYPEDIA page on capacitors:
    http://www.educypedia.be/electronics/capacitors.htm

    Bertus
     
  3. sceadwian

    New Member

    Jun 1, 2009
    499
    37
    The difference isn't very well technically defined that I can tell, an insulator is something that conducts electricity poorly, where according to dictionary.com a dielectric is a material which substances when there is an applied voltage will arrange itself to act as an insulator.
     
  4. deter_dangler

    Thread Starter New Member

    May 19, 2010
    6
    0
    I just read about dielectric and insulator on the wiki..

    One thing i understood is insulators are materials with low conductivity where as Dielectric is a material with high polerizability.

    Thanks guys for your replies.
     
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