Register to reply

Calculate the resistance per meter

by looi76
Tags: meter, resistance
Share this thread:
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?
Phys.Org News Partner Science news on
Experts defend operational earthquake forecasting, counter critiques
EU urged to convert TV frequencies to mobile broadband
Sierra Nevada freshwater runoff could drop 26 percent by 2100
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

Register to reply

Related Discussions
Air resistance, how to calculate it? General Physics 9
Calculate the resistance of iron if... Introductory Physics Homework 1
Calculate Load Resistance Engineering, Comp Sci, & Technology Homework 4
How do i calculate air resistance? Classical Physics 1
Resistance of meter coils Electrical Engineering 20