Question

The cross-sectional area of a wire of length 3.5 is 0.125 x 10⁻⁸ m². If its resistance is 15 ohm calculate its resistivity?

please give answer fast

Answer 1

Explanation:

R=23Ω

l=1.0m

ρ=1.84×10−6Ωm

A=?

A=Rρl

∴A=231.84×10−6×1

A=0.08×10−6m2=8.0×10−8m2