Resistivities at 20°C Material Aluminum Copper Gold Nichrome Silver Tungsten Resistivity (2•m) 2.82 × 10-8 1.72 × 10-8 2.44 × 10-8 150. × 10-8 1.59 x 10-8 5.60 × 10-8 Resistivity (p) m Aluminum 2.82 x 10-8 Copper 1.72 x 10-8 Silver 1.59 x 10-8 Carbon 3.5 x 10-5 Teflon 1x 1016 1013-1016 Rubber (hard) Maple wood Silicon 30 x 1010 20-2300 1. Compute the resistance of a hardened copper rod 2 meters long and 8 mm in diameter if the resistivity of the material is 1.756 x 10-8 ohm-meters. Given: Find: Formula: Substitution: Solution: Material
Resistivities at 20°C Material Aluminum Copper Gold Nichrome Silver Tungsten Resistivity (2•m) 2.82 × 10-8 1.72 × 10-8 2.44 × 10-8 150. × 10-8 1.59 x 10-8 5.60 × 10-8 Resistivity (p) m Aluminum 2.82 x 10-8 Copper 1.72 x 10-8 Silver 1.59 x 10-8 Carbon 3.5 x 10-5 Teflon 1x 1016 1013-1016 Rubber (hard) Maple wood Silicon 30 x 1010 20-2300 1. Compute the resistance of a hardened copper rod 2 meters long and 8 mm in diameter if the resistivity of the material is 1.756 x 10-8 ohm-meters. Given: Find: Formula: Substitution: Solution: Material
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Transcribed Image Text:Resistivities at 20°C
Material Resistivity (2 m)
Aluminum
2.82 × 10-8
Copper
1.72 × 10-8
Gold
2.44 x 10-8
Nichrome
150. × 10-8
Silver
1.59 × 10-8
Tungsten
5.60 × 10-8
Resistivity (ρ) Ωm
Aluminum
2.82 x 10-8
1.72 x 10-8
Copper
Silver
1.59 x 10-8
Carbon
3.5 x 10-5
Teflon
1 x 1016
10131016
Rubber (hard)
Maple wood
Silicon
30 x 1010
20-2300
1. Compute the resistance of a hardened copper rod 2 meters long and 8 mm in
diameter if the resistivity of the material is 1.756 x 10-8 ohm-meters.
Given:
Find:
Formula:
Substitution:
Solution:
Material
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