A cylindrical copper cable carries a current of 1300 A. There is a potential difference of 1.6 10-2 V between two points on the cable that are 0.38 m apart. What is the radius of the cable?
rho=1.7e-8(resistivity of copper)
Where: V=voltage, I=Current, R=Resistance
Where: R= resistance, rho=1.7e-8(resistivity of copper), Length in meters, r=radius
The Attempt at a Solution
1. Find Resistance.
then I used:
what do I keep doing wrong??