Graphing Resistivity (10:29)
What data is needed on the x and y axes of a graph that will have a straight, best-fit line with a slope equal to the resistivity of nichrome? We collect the data and answer this question.
This is an AP Physics 1/JEE/NEET Topic.
0:01 The nichrome wire
0:40 Determining what goes on the axes
2:18 Determining cross-sectional area
3:01 Understanding what “L” really is.
4:46 Collecting the data
5:39 Why I decreased ΔV as L decreased
7:18 An incandescent lightbutb
7:55 Completing the data table and graph
9:24 Why the y-intercept is not zero