Question

copper wire having cross sectional area 0.01milli metre square resistance 1000ohms and resistivity 1.7*ten power -8then length in metres is=?

Answer 1

Resistance is given as
R = ρ L / A

The length (L) is
L = R A / ρ
= [1000 Ω × 0.01 mm² × 10^-6 m²/mm²] / (1.7 × 10^-8 Ω m)
= 588.235 m

∴ Length of copper wire is 588.235 m