A square coil and a rectangular coil are each made from the same length of wire….

A square coil and a rectangular coil are each made from the same
length of wire. Each contains a single turn. The long sides of the
rectangle are twice as long as the short sides. Find the ratio
Ï„square /Ï„rectangle of the
maximum torques that these coils experience in the same magnetic
field when they contain the same current.