Question

calculate the resistivity of copper wire of length one metre and area of cross section 2 millimetre square resistance of copper wire is 5 Ohm​

Answer 1

Explanation:

Engineers often ask how to calculate the resistance of a cable, there is a very simple formula that works well within an ohm or so with copper cable. 19 ÷ by 2.5mm² will give you 7.6 ohms per km. ÷ by 1000 for resistance per meter. 19 ÷ by 4mm² will give you 4.75 ohms per km.