Table 20.1 Resistivities of Various Materials Resistivity p (N-m) Resistivity p (N.m) Material Material Conductors Semiconductors Aluminum 2.82 x 10-8 Carbon 3.5 x 10-5 Copper 1.72 x 10-8 Germanium 0.5 Gold 2.44 x 10-8 Silicon 20-2300 Iron 9.7 x 10-8 Insulators 95.8 x 10-8 Mercury Nichrome (alloy) 10-1015 1013-1016 Mica 100 x 10-8 Rubber (hard) Silver 1.59 x 10-8 Teflon 1016 Tungsten 5.6 x 10-8 Wood (maple) 3 x 1010 "The values pertain to temperatures near 20 °C. "Depending on purity.

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Table 20.1 Resistivities of Various Materials
Resistivity p
(N-m)
Resistivity p
(N.m)
Material
Material
Conductors
Semiconductors
Aluminum
2.82 x 10-8
Carbon
3.5 x 10-5
Сорper
1.72 x 10-8
Germanium
0.5
Gold
2.44 x 10-8
Silicon
20-2300
Iron
9.7 x 10-8
Insulators
Mercury
Nichrome (alloy)
95.8 x 10-8
Mica
10-1015
100 x 10-*
Rubber (hard)
1013-1016
Silver
1.59 x 10-8
Teflon
1016
Tungsten
5.6 x 10-8
Wood (maple)
3 x 1010
"The values pertain to temperatures near 20 °C.
"Depending on purity.
Transcribed Image Text:Table 20.1 Resistivities of Various Materials Resistivity p (N-m) Resistivity p (N.m) Material Material Conductors Semiconductors Aluminum 2.82 x 10-8 Carbon 3.5 x 10-5 Сорper 1.72 x 10-8 Germanium 0.5 Gold 2.44 x 10-8 Silicon 20-2300 Iron 9.7 x 10-8 Insulators Mercury Nichrome (alloy) 95.8 x 10-8 Mica 10-1015 100 x 10-* Rubber (hard) 1013-1016 Silver 1.59 x 10-8 Teflon 1016 Tungsten 5.6 x 10-8 Wood (maple) 3 x 1010 "The values pertain to temperatures near 20 °C. "Depending on purity.
Activity 2: Find the Resistance
Directions: Use the data provided in the table to calculate the resistance of
each material. Simplify your answers with the correct number of significant
figures.
Cross-sectional
Material
Length
Resistance
area
6.4x10-5m²
23x10-7m2
25 m
Copper
Nichrome
50 m
17x10-5m²
5.3x10-6m²
Carbon
75 m
Wood
10 m
Mica
30 cm
9.6x10-8m²
Transcribed Image Text:Activity 2: Find the Resistance Directions: Use the data provided in the table to calculate the resistance of each material. Simplify your answers with the correct number of significant figures. Cross-sectional Material Length Resistance area 6.4x10-5m² 23x10-7m2 25 m Copper Nichrome 50 m 17x10-5m² 5.3x10-6m² Carbon 75 m Wood 10 m Mica 30 cm 9.6x10-8m²
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