Calculate resistance from resitivity

[iharuyuki]

Homework Statement

Homework Equations

R = pL/A

The Attempt at a Solution

R(a) = 2x10^-4(0.15)/[pi(0.0005/2)^2] = 152.789 [Ohms]

It is slightly off. Is there a subtle point that I've missed?

Thank you very much.

 

[BvU]

No, except that when they give you the resistivity and the diameter in 1 digit accuracy each, you cannot return a resistance with 6 digits precision. Because the first digit is a 1, you return two digits. That means 1.5 x 10², but 150 is acceptable generally.

 

[iharuyuki]

I see, thank you very much.