conductivity constantan

2010-02-26 11:27 am
i need to find out he expect value for the conductivity of a constantan wire. anyone knows it?

回答 (1)

2010-02-26 5:04 pm
✔ 最佳答案
Constantan Constantan is a copper -nickel alloy usually consisting of 55% copper and 45% nickel Its main feature is its coductivity which is Constantan is a copper -nickel alloy usually consisting of 55% copper and 45% ... Thermal conductivity at 23°C | 19.5 W/(m.K) .Resistivity is defined as the inverse of the conductivity σ (sigma ), of the material, or:\ ... Table of resistivities: Constantan | 4.9×10−7 | 0.000 008 .
Constantan is a copper-nickel alloy usually consisting of 55% copper and 45% nickel.[1] Its main feature is its resistivity which is constant over a wide range of temperatures. Other alloys with similarly low temperature coefficients are known, such as manganin (Cu86Mn12Ni2).
The 55% copper/45% nickel alloy constantan is used to make resistor s ... Electrical conductivity : approx (3–5)×10 6 (Ω·m)−1.
參考: Wikipedia.org & WIKIPEDIA (The free Encyclopedia)


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