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Resistivity and resistance

  1. Feb 17, 2009 #1
    What's the difference between resistivity and resistance?
  2. jcsd
  3. Feb 17, 2009 #2
    Resistivity is a measure of how well a particular substance or material opposes an electric current, whereas resistance measures how well a particular component in an electrical network resists an electric current.

    So we can say that a resistor made of iron has a resistance of 9 ohm, and that iron has a resistivity of 1.0×10-7 (ohm×m). Notice that resistanse and resistivity is measured in different units.
  4. Feb 18, 2009 #3
    thank you this is a great explanation
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