Question

What is the resistance of a 3.5m copper wire that has a cross-sectional area of 5.26 x 10-6 m2?

Answer 1

Answer: 1.1 x 10^-2

Explanation: A P E X

Answer 2

R=ρ
`(L)/(A)`

Where, R is resistance

ρ is resistivity,

L is length and

A is cross sectional area

Given, L= 3.5m

A=5.26 x 10⁻⁶ m²

ρ=1.68×10⁻⁸ ohms m

∴ R=
`((1.68)(3.5))/(5.26*100)`

⇒ R=1.11×10⁻² ohms