Question

A wire 3.0m long , of uniform cross-section area2.0mm² has a conductance of 1.25ohm-1, what is the resistivity of the material of the wire A. 5.3*10-7Ω-m B. 2.15Ω-m C. 8.3*10-7Ω-m D. 1.9*10-7Ω-m

Answer 1

Answer:

Explanation:

resistance= 1/conductance

= 1/1.25

R = ρ l/A

ρ = R * A/l

= 2*10^-6/1.25*3

=  5.3*10-7Ω-m

option a