Resistivity - Cross Sectional Area
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.
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.
Hey Stefan,
When you are working on Physics problems it is best to work in standard SI units. Whatever you do everything needs to be in the same unit never forget that.
So in this case convert everything to meter's, also be careful about the square meters for the cross sectional area!
Hope this helps
When you are working on Physics problems it is best to work in standard SI units. Whatever you do everything needs to be in the same unit never forget that.
So in this case convert everything to meter's, also be careful about the square meters for the cross sectional area!
Hope this helps
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