. A vertically oriented square loop of wire of resistivity p is released from rest and allowed to fall purely under the influence of gravity (a = g). The loop's initial position is just at the top of a limited region in space with height l. Inside this region, the magnetic field B is uniform and perpendicular to the plane of the loop as shown in the figure below. Let the side-length of the loop be s and the diameter of the (circular) wire be d. O O O O O O O e B O O O O O O O O O O O Show that the magnitude of the force experienced by the loop just as it is exiting the field region is F = B2 Td2 8 \\ 2g(l - s) 16p