A wire with 3 micron radius is made from 9 cm copper, 0.5 cm iron, and 11 cm copper all joined end to end (i.e., in series). Assume the joints are perfect and have no additional resistance. What is the total resistance of the wire
A wire with 3 micron radius is made from 9 cm copper, 0.5 cm iron, and 11 cm copper all joined end to end (i.e., in series). Assume the joints are perfect and have no additional resistance. What is the total resistance of the wire
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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A wire with 3 micron radius is made from 9 cm copper, 0.5 cm iron, and 11 cm copper all joined end to end (i.e., in series). Assume the joints are perfect and have no additional resistance. What is the total resistance of the wire?
Transcribed Image Text:Table 19-1 Electrical conductivity of selected
materials at T = 300 K*
Conductivity
(ohm-1. cm-1)
Conductivity
(ohm-1. cm-1)
Material
Material
Superconductors
Semiconductors
Hg, Nb;Sn
YBa,Cu307-x
MgB2
Group 4B elements
Si
Ge
4 x 10-6
Infinite (under certain conditions
such as low temperatures)
0.02
Metals
Compound semiconductors
Alkali metals
GaAs
2.5 x 10-9
Na
2.13 x 105
AIAS
0.1
K
1.64 x 105
Sic
10-10
Alkali earth metals
Mg
lonic Conductors
2.25 x 105
3.16 x 105
Indium tin oxide (ITO)
Yttria-stabilized zirconia (YSZ)
-104
<1014
Ca
Group 3B metals
Insulators, Linear, and Nonlinear Dielectrics
3.77 x 105
0.66 x 105
Al
Polymers
Polyethylene
Polytetrafluoroethylene
Polystyrene
Ероху
Ga
10-15
10-18
10-17 to 10-19
Transition metals
Fe
1.00 x 105
Ni
1.46 x 105
10-12 to 10-17
Ceramics
Group 1B metals
Cu
Ag
Alumina (Al2O3)
Silicate glasses
Boron nitride (BN)
Barium titanate (BaTiO3)
C (diamond)
10-14
10-17
10-13
10-14
<10-18
5.98 x 105
6.80 x 105
Au
4.26 x 105
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