Find the resistance of a wire of diameter 2 mm, length 40 m and resistivity 1.66x 10^-7 Ωm
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Find the resistance of a wire of diameter 2 mm, length 40 m and resistivity 1.66x 10^-7 Ωm

[From: ] [author: ] [Date: 12-02-14] [Hit: ]
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Find the resistance of a wire of diameter 2 mm, length 40 m and resistivity 1.66x 10^-7 Ωm

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Diameter =2mm, radius 1 mm
Area = π (mm)^2 = πe-6 m^2
R = ρ L / A = 1.66 e-7 *40 / π*1e-6 = 2.11 Ω
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