Question

Given a copper-nickel wire (of resistivity=0.4Ωmm²m^-1), cross-sectional area 0.1mm² and length 3.5m. It's resistance is ?

Answer 1

$R=ρ\frac {L} {A}$

$R=0.4×(\frac {3.5}{0.1})$

$R=14\Omega$