Asquare loop and a rectangular loop are each made from the same length of wire.

9/5

Explanation:

The torque due to magnetic field is given by , where is the angle between the magnetic moment vector () and the magnetic field (). Note that B is constant in magnitude and direction, therefore, we can obtain the ratio of the torques by finding the ratio of the areas for both loops:

We start by naming the total length of the wires

1) Square loop:

the square sides are each. Therefore its are will be

1) Rectangle loop:

now the rectangle has also a perimeter of . Let be the length of the short sides of it, then we have:

now the area of the rectangle is

then the ratio

wavelength

Explanation: