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Capacitors: why is the dielectric constant defined the way it is?

  1. Sep 6, 2013 #1
    usually when we have some initial variable U(0), and we have some factor K that changes this initial variable, we usually express the new variable U(f) like so..


    and NOT the other way around...

    so why is the dielectric constant expressed in the following way?


    this doesn't make any sense to me
  2. jcsd
  3. Sep 6, 2013 #2

    Simon Bridge

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