Design a 1500-meter-long electrical transmission line with a cross-section size of 0.00199 cm2 that can carry a 50-amp current with a power loss of no more than 5 x105 W. Table 1 shows the electrical conductivity of a variety of materials. What kind of material could be a good candidate?
Design a 1500-meter-long electrical transmission line with a cross-section size of 0.00199 cm2 that can carry a 50-amp current with a power loss of no more than 5 x105 W. Table 1 shows the electrical conductivity of a variety of materials. What kind of material could be a good candidate?
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Design a 1500-meter-long electrical transmission line with a cross-section size of 0.00199 cm2 that can carry a 50-amp current with a power loss of no more than 5 x105 W. Table 1 shows the electrical conductivity of a variety of materials. What kind of material could be a good candidate?
Transcribed Image Text:Table 1: Electrical conductivity of selected materials at T = 300 K*
Conductivity
(ohm 1. cm 1)
Conductivity
(ohm .cm-1)
Material
Material
Superconductors
Hg. Nb3Sn
YBa;Cuz07-
MGB2
Semiconductors
Group 4B elements
Si
Infinite (under certain conditions
4x 106
such as low temperatures)
Ge
0.02
Compound semiconductors
Metals
Alkali metals
2.5x 10-9
0.1
10-10
GaAs
2.13 x 105
1.64 x 105
Na
AIAS
K
SiC
Alkali earth metals
Mg
lonic Conductors
2.25 x 105
3.16 x 105
Indium tin oxide (ITO)
Ca
Ytria-stabilized zirconia (YSZ)
Group 38 metals
Al
Insulators, Linear, and Nontinear Dielectrics
Polymers
Polyethylene
Polytetrafluoroethylene
Polystyrene
Ероку
Ceramics
Alumina (AlO3)
Silicate glasses
Boron nitride (BN)
Barium titanate (BaTIO3)
C (diamond)
3.77 x 105
0.66 x 105
10-15
10-18
10-17 to 10-19
10-12 to 10-17
Transition metals
Fe
1.00 x 105
1.46 x 105
Ni
Group 18 metals
5.98 x 105
6.80 x 105
4.26 x 105
Cu
10-14
10-17
10-13
10-14
Ag
Au
< 10-18
"Unless specified otherwise, assumes high-purity material.
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