You apply a potential difference of 4.50 V between the ends of a wire that is 2.50 m in length and 0.654 mm in radius. The resulting current through the wire is 17.6 A. What is the resistivity of the wire?

ρ = 1.37x10⁻⁷ Ωm

Explanation:

The resistivity, ρ, of a wire is defined as:

ρ = R*A / L

Where R is resistance:

V / i= R

4.50V / 17.6A = 0.2557Ω

A is the area of the cross-section:

πR²

π* (0.654x10⁻³m)²

A = 1.344x10⁻⁶m²

And L is length of the wire:

L = 2.50m.

Replacing:

ρ = 0.2557Ω*1.344x10⁻⁶m² / 2.50m

i just did an experiment like this in my science class. also the answer is yes, it will get separated because they are two opposites meaning if they are opposite they can not attract.

hope this .!