Question

how to calcullate amount of copper from crossection area

Answer 1

Calculate the total DC resistance of a 100 metre roll of 2.5mm2 copper wire if the ... A 20 metre length of cable has a cross-sectional area of 1mm2 and a resistance of 5 ohms.

Answer 2

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The cross-sectional area of the wire is the area of a circle of radius r: A=πr2=π(d2)2, where d is the diameter of the wire.