3. Consider the following scenario: A civil engineering student measures the resistivity of aparticular cylindrical wire for different lengths L by tapping at points the wire from 0.1 m to 1 m in steps of 0.1 m. The radius of the wire is 0.60 mm. The experiment is carried out under following circumstances: 2) The best line has been drawn through the points given below and determine the resistivity of the wire from the slope of the plot between blue marked points. b) Based on the value of resistivity you calculated, what is the material wire resistor made of? Make sure everything is in ohms and meters, otherwise your units will not work out correctly in the end!
3. Consider the following scenario: A civil engineering student measures the resistivity of aparticular cylindrical wire for different lengths L by tapping at points the wire from 0.1 m to 1 m in steps of 0.1 m. The radius of the wire is 0.60 mm. The experiment is carried out under following circumstances: 2) The best line has been drawn through the points given below and determine the resistivity of the wire from the slope of the plot between blue marked points. b) Based on the value of resistivity you calculated, what is the material wire resistor made of? Make sure everything is in ohms and meters, otherwise your units will not work out correctly in the end!
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Transcribed Image Text:3. Consider the following scenario: A civil engineering student measures the resistivity of a particular
cylindrical wire for different lengths L by tapping at points the wire from 0.1 m to 1 m in steps of
0.1 m. The radius of the wire is 0.60 mm. The experiment is carried out under following
circumstances:
a) The best line has been drawn through the points given below and determine the resistivity
of the wire from the slope of the plot between blue marked points.
b) Based on the value of resistivity you calculated, what is the material wire resistor made of?
Make sure everything is in ohms and meters, otherwise your units will not work out correctly
in the end!
Table 1. Resistivity of Some Common Materials.
Resistivity p (N-m)
1.59x10
1.72x10
2.44x10
2.65x10
2x10
2.2x107
Material
Silver
Соpper
Gold
Aluminum
Steel
Lead
Manganin (Cu, Mn, Ni alloy)
Constantan (Cu, Ni alloy)
Mercury
Nichrome (Ni, Fe, Cr alloy)
4.4x10
4.9x107
9.6x10
1x10
9
8
6
5
4
3
2
1
0,0
0,2
0,4
0,6
0,8
1,0
L(m)
7.
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