The resistance of a 50 m long copper wire is 0.267 Ω at 20 °C. Calculate the diameter of the wire. The resistivity of copper is 1.68 x 10-8 Ωm.
Resistivity of copper = = 1.68 x 10-8m
Length of the copper wire = L = 50 m
Diameter of the wire = D
Cross-sectional area of the wire = A = D2/4
Resistance of the copper wire = R = 0.267
D = 2 x 10-3 m
Diameter of the copper wire = 2 x 10-3 m
The resistance of a 50 m long copper wire is 0.267 Ω at 20 °C. Calculate...
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