Chapter 27, Problem 27.10DQ

A loose, floppy loop of wire is carrying current I. The loop of wire is placed on a horizontal table in a uniform magnetic field $\stackrel{\to }{\text{B}}$ perpendicular to the plane of the table. This causes the loop of wire to expand into a circular shape while still lying on the table. In a diagram, show all possible orientations of the current I and magnetic field $\stackrel{\to }{\text{B}}$ that could cause this to occur. Explain your reasoning.