Calculate the area of cross-section of a wire if its length is 1.0m, its resistance is 23Ω, and the resistivity of the material of the wire is 1.84×10-6Ωm.
ScienceClass 10ICSEAnswered 27 Mar 2026
Answer
Given,
l = 1.0m
R = 23 ohm
ρ = 1.84×10-6Ωm
We have, R = ρl/A
23 = 1.84×10-6 × 1/A A = 8×10-8 m2