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Physics > Electrical Resistivity Values

Electrical resistivity is a measurement of how strongly a material opposes the flow of electric current. The electrical resistivity ρ of a material is given by...

ρ = R ×
A
l


Where:
  • ρ is the static resistivity (measured in ohm-metres, Ω)
  • R is the electrical resistance of a uniform specimen of the material (measured in ohms, Ω)
  • l is the length of the piece of material (measured in metres, m)
  • A is the cross-sectional area of the specimen (measured in square metres, m2)
The tables below shows the electrical resistivity of certain metals and non-metals.

Metals ρ(nΩ·m)
Aluminium 26.5
Brass 64
Chromium 126
Copper 17.1
Gold 22.1
Iron 96.1
Lead 208
Lithium 92.8
Mercury(0°C) 941
Manganese 1440
Nichrome 1500
Nickel 69.3
Palladium 105.4
Platinum 105
Plutonium 1414
Silver 15.9
Solder 150
Steel, plain 180
Steel, stainless 720
Tantalum 131
Tin(0°C) 115
Titanium(0°C) 390
Tungsten 52.8
Uranium(0°C) 280
Zinc 59

Non-metals ρ(nΩ·m)
Aluminium oxide (14°C) 1×1014
Aluminium oxide (300°C) 3×1011
Aluminium oxide (800°C) 4×106
Carbon, amorphous 0.35
Carbon, diamond 2.7
Carbon, graphite 650×10−9
Germanium 0.46
Pyrex 7740 40,000
Quartz 75×1016
Silicon 640
Silicon dioxide (20°C) 1×1013
Silicon dioxide (600°C) 70,000
Silicon dioxide (1300°C) 0.004
Water, liquid (0°C) 861,900
Water, liquid (25°C) 181,800
Water, liquid (100°C) 12,740