Question

Calculate the resistivity of a material if the wire that was made from this having a

resistance of 20Ω, length of 10m and radius of its cross section is 7mm.​

Answer 1

Answer:

Calculate the resistivity of the material of a wire 1.0 m long, 0.4 mm in diameter and having a resistance of 2.0 Omega. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams. As R=ρlA=ρlπr2,ρ=πRr2l=3.14×(2.0Ω)×(0.2×10-3m)21.0m=25×10-8Ωm