Question

When we pass an electric current In a straight wire, it behaves like a magnet. Where are the south and the north poles located?

Answer 1

When we pass an electric current through a long, straight wire, it produces circular magnetic field around itself as shown in the figure below.

Now north pole is defined as the point in a magnet where magnetic field lines emerge. As you can see that in this case no particular point can be said to be that.