Imagine two identical, parallel wires that are infinitely long. The two wires are spaced one meter apart (still in parallel). When current is passed through the

Imagine two identical, parallel wires that are infinitely long. The two wires are spaced one meter apart (still in parallel). When current is passed through the wires they would exert force on each other proportional to current. The infinitely long part ensures the force is uniform through all parts of the wire. Hope that helps.