Question #104561

A wire 1000 ft long has a resistance of 0.5 kΩ and an area of 94 CM. Of what material is the wire made (T= 20°C)?

Expert's answer

Resistivity of various materials:

"\\rho=R\\frac{A}{l}"

A - area in circular mils (CM)

l - length (feet)

"R=0.5k\\Omega=500\\Omega - resistance"

"\\rho=500\\frac{94CM}{1000ft}=47 ~CM\\cdot \\Omega\/ft ~at~ 20\u00b0C"

the resulting resistivity value matches Nickel

Answer: Nickel

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Harold Awesome05.09.23, 07:08thank you

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