Resistivity

Resistivity Lab

Objective: The purpose of this lab is to find out the relationship between the resistivity constant, length of the wire, and area of the wire compared to the total resistivity.

Procedure: To collect data for this lab, go to [] and run the program. 1) Set the resistivity constant to 0.5. 2) Set total resistivity at 1.24 to 1.26. 3) Change L and A so that the total resistivity stays at 1.24 to 1.26. (Hint make note of how changing each variable affects total resistivity) 4) Repeat 4 to 5 times for multiple data sets. 4) Record all values for L and A.

Analysis questions: 1) What is the relatioship between the resistivity constant and total resistivity? 2) What is the relationship between the length of a wire and total resistivity? 3) What is the relationship between the area of a wire and total resistivity? 4) Using knowledge gained in this lab, does more electricity flow through a wire with a 3m diameter or a wire with a 6m diameter?

Graphs: Example Hint: Make the slope total resistivity. Note: Only one set of data (one restivity constant & total resistance) needs to be graphed

Percent Error: (Actual-Exp.)/Actual*100 ex. (1.256-1.25)/1.25*100 = .48%

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