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Voltage drop across a wire

 
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Mar22-09, 10:54 AM   #1
 

Voltage drop across a wire

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?
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Mar22-09, 11:22 AM   #2
 
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Perhaps you should show your calculation?
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