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Calculate the resistance per meter

  • Thread starter looi76
  • Start date
  • #1
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Homework Statement



Calculate the resistance per meter at room temperature of a constant wire if diameter [tex]1.25mm[/tex]. The resistivity of constant a at room temperature is [tex]5x10^-7\Omega{m}[/tex]

Homework Equations



I'm not sure, but I think this is the right formula:
[tex]R = \frac{Pl}{A}[/tex]

The Attempt at a Solution



[tex]Area = \pi \times \left(\frac{1.25 \times 10^{-3}}{2}\right)^2[/tex]
[tex]A = 1.2 \times 10^{-6} m^2[/tex]

What is Pl?
 

Answers and Replies

  • #2
13
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P is the resistivity and L is the length of the wire, so you are really solving for R/L
 

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