Find the resistance of a wire of diameter 2 mm, length 40 m and resistivity 1.66x 10^-7 Ωm
-
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
======================
Area = π (mm)^2 = πe-6 m^2
R = ρ L / A = 1.66 e-7 *40 / π*1e-6 = 2.11 Ω
======================