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.YZ 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. Material Silver Сорper Gold Aluminum Steel Resistivity p ( Q-m ) 1.59x10 1.72×10* 2.44×10 2.65×10 2x10 2.2x107 Lead Manganin (Cu, Mn, Ni alloy) Constantan (Cu, Ni alloy). Mercury Nichrome (Ni, Fe, Cr alloy) 4.4x10 4.9x10 9.6x10 Ix10 9 - 8 - 7- 6- 5 3- 2 0,0 0,2 0,4 0,6 0,8 1,0 L(m)
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.YZ 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. Material Silver Сорper Gold Aluminum Steel Resistivity p ( Q-m ) 1.59x10 1.72×10* 2.44×10 2.65×10 2x10 2.2x107 Lead Manganin (Cu, Mn, Ni alloy) Constantan (Cu, Ni alloy). Mercury Nichrome (Ni, Fe, Cr alloy) 4.4x10 4.9x10 9.6x10 Ix10 9 - 8 - 7- 6- 5 3- 2 0,0 0,2 0,4 0,6 0,8 1,0 L(m)
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter12: Electronic Control Devices
Section: Chapter Questions
Problem 14RQ
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