Hello.
Just a real quick question on resistivity. For the equation, resistivity = RA/L is the cross sectional area measured in meters, the same as the length, or does it not matter?
for example, I have a question asking me to find the resistance when
5x10^-7 = RA/5 (meters)
The radius of the wire is 0.16mm. Should I do Pi x 0.16^2? Or convert it into 0.00016m then substitute and rearrange the formula.
Thanks.