Length of wire: 0.240 m Cross Sectional Diameter Voltage (V) Current Resistance Resistivity Area (m) (A) ( ) ( ) 0.000511 0.0901 1.08790 0.000813 0.0363 1.09656 0.001025 0.0231 1.11482 0.001277 0.0147 1.10209 Mean of Resistivity: Standard Deviation of Resistivity: Theoretical Resistivity: Percent Error:
Length of wire: 0.240 m Cross Sectional Diameter Voltage (V) Current Resistance Resistivity Area (m) (A) ( ) ( ) 0.000511 0.0901 1.08790 0.000813 0.0363 1.09656 0.001025 0.0231 1.11482 0.001277 0.0147 1.10209 Mean of Resistivity: Standard Deviation of Resistivity: Theoretical Resistivity: Percent Error:
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:Cross Sectional
Area
Length
Figure 2
Then the cross sectional area of the wire can be calculated using the equation of the
area of a circle:
A = ar?
(5)
In this experiment, you will measure V and I to determine R for various lengths of
wire. You will then make a graph of Resistance (Y-axis) versus length (X-axis). The plot
will result in a straight line that has a slope equal to
slope =
A
(6)
From equation 6, it is possible to solve the resistivity in terms of the slope and the
cross sectional area:
p = slope * A
(7)
The manufacture values of the resistivity corresponding to the wires used in the
experiment are reported in Table 1. These values will be used as the theoretical when
calculating percent error.
Table 1. Theoretical resistivity of different materials according to manufacturer.
Attracted
Material
Color
Diameter (m)
Resistivity (Qm)
to Magnet
Brass
Yellow
No
0.000508
7.0 x10-8
0.000813
0.001016
0.001270
Соpper
Nichrome
Stainless
Red
No
0.001016
1.8 x10-8
Dark Gray No
Dark Gray Yes
0.001016
105 x10-8
0.001016
79 х10-8
Steel
Transcribed Image Text:Length of wire: 0.240 m
Cross Sectional
Diameter
Voltage
(V)
Current
Resistance
Resistivity
Area
(m)
(A)
( )
( )
0.000511
0.0901
1.08790
0.000813
0.0363
1.09656
0.001025
0.0231
1.11482
0.001277
0.0147
1.10209
Mean of Resistivity:
Standard Deviation of Resistivity:
Theoretical Resistivity:
Percent Error:
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