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Calculate the resistance per meter

by looi76
Tags: meter, resistance
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looi76
#1
May9-08, 05:12 AM
P: 81
1. The problem statement, all variables and given/known data

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]

2. Relevant equations

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

3. 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?
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jimmyting
#2
May9-08, 05:17 AM
P: 13
P is the resistivity and L is the length of the wire, so you are really solving for R/L


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