Voltage drop across a wire


by zyphriss2
Tags: voltage, wire
zyphriss2
zyphriss2 is offline
#1
Mar22-09, 10:54 AM
P: 18
Compute the voltage drop along a 25 m length of household no. 14 copper wire (used in 15A circuits). The wire has diameter 1.628 mm and carries a 15 A current.


Vdrop=I*R

R=rho(L/A)




I just plugged the resistivity of copper wire which is 1.72*10^-8, length, and area in to find the resistance. Which is .206 and then I found the voltage drop of 3.09v which was wrong what did i do wrong?
Phys.Org News Partner Science news on Phys.org
Cougars' diverse diet helped them survive the Pleistocene mass extinction
Cyber risks can cause disruption on scale of 2008 crisis, study says
Mantis shrimp stronger than airplanes
LowlyPion
LowlyPion is offline
#2
Mar22-09, 11:22 AM
HW Helper
P: 5,346
Perhaps you should show your calculation?


Register to reply

Related Discussions
Voltage drop across wire Electrical Engineering 1
Voltage Drop Engineering, Comp Sci, & Technology Homework 3
voltage drop Introductory Physics Homework 3
Voltage Drop General Physics 2
voltage drop Electrical Engineering 1