Find the length of a wire of diameter 2 mm, and resistivity 1.571x 10^-7 Ωm and resistance 2 Ω
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Find the length of a wire of diameter 2 mm, and resistivity 1.571x 10^-7 Ωm and resistance 2 Ω

[From: ] [author: ] [Date: 12-02-18] [Hit: ]
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Find the length of a wire of diameter 2 mm, and resistivity 1.571x 10^-7 Ωm and resistance 2 Ω

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Diameter =2mm, radius 1 mm
Area = π (mm) ^2 = πe-6 m^2
L = A R/ ρ = 2* π*1e-6/1.571e-7 =39.995 m
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