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Resitivity, the Ohm metre

  1. Aug 1, 2014 #1

    davenn

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    I just need a clarification, I have been through a dozen www sites and cannot find an answer

    they show how resistivity is worked out eg ....

    the Ohm meter is usually shown with a "dot" between Ohm and metre
    Is this the same as Ohm times metre ? or Ohms per metre or something else?

    I would have thought that Ohms per metre would be Ohms/metre ?

    cheers
    Dave
     
    Last edited: Aug 1, 2014
  2. jcsd
  3. Aug 1, 2014 #2

    Drakkith

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    I don't think it's ohm x meter, as it doesn't make sense that way. It looks to me like it's just convention based on the units used to derive it.
     
  4. Aug 1, 2014 #3
    It's ohm x meter, otherwise the dimensions of the units wouldn't make sense for your first equation, i.e:

    E/J [V/m/(A/m^2) = V/A*m = Ω*m]
     
  5. Aug 1, 2014 #4

    Drakkith

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    Hmm. Guess I must have misunderstood the math. Whoops.
     
  6. Aug 1, 2014 #5

    davenn

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    That's OK Drak :wink: you probably still had a better grasp than me

    thanks milesyoung

    appreciate the clarification. It was something that wasn't taught in my electronics classes many years ago

    and if I was ... refer to my signature :smile:

    Dave
     
    Last edited: Aug 1, 2014
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