Using the R-L graph for a long conducting cylindrical wire with the diameter of

Question

Using the R-L graph for a long conducting cylindrical wire with the diameter of D = 0.149 +/- 0.0102 mm, calculate the value of the resistivity in Ohm·m, if the slope is S=5.684 +/- 0.035. Express the answer (without the unit) to three significant figures.

Tip: you can use scientific/exponential notation to represent numeric values. Eg., -0.0001 can be written as 1.0e-4 or as 1.0E-4. Spaces are not allowed.

Using the R-L graph for a long conducting cylindrical wire with the diameter of D = 0.149 +/- 0.0102 mm, calculate the value of the resistivity p in Ohm.m, if the slope is S=5.684 +/- 0.035. Express the answer (without the unit) to three significant figures. Tip: you can use scientific/exponential notation to represent numeric values. Eg., -0.0001 can be written as 1.0e-4 as 1.0E-4. Spaces are not allowed.

Explanation / Answer

we know, resistance R = rho* L/A

rho = R /L *A

= 5.684* pi*0.149^2/4

= 0.0991 ohm

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