Question

a negligible small current is passed through the wire of unifoam cross section 6O×10↑-7m² and its distance is measured to be 5 ohm. what is the reactivity of material at the temperature of experiment
plz give me correct answer
plz​

Answer 1

SOLUTION:-

Let resistivity coefficient be ρ

$R</p><p></p><p> = ρ\frac{1}{A} \\ ρ= \frac{RA}{1} \\ ρ= 2 \times {10}^{ - 7} Ωm$