Question

Resistance of a metal wire of length 1 m is 262 at 20°C. If the diameter of the wire is 0.3 mm, what will be the resistivity of the metal at that temperature? ​

Answer 1

Answer:

hope it helps please follow me and mark me as brainleast answer

Explanation:

R=26 Ω

l=1m

d−0.3mm

r=2d=20.3×10−3=0.15×10−3m

A=πr2=3.14×(0.15×10−3)2=0.071×10−6m2

R=AρL

or ρ=lRA=126×0.071×10−6=1.84×10−6Ωm