
#1
May908, 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? 



#2
May908, 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  
[SOLVED] 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 