Q4. A rectangular coil having sides 4 cm and 6 cm lies in a plane and consists of 100 turns of wire carrying a current of 5 A. A long straight wire carrying a current of 2 A lies in the same plane as the coil parallel to and 4 cm from the nearest long side, such that its current, and the current of the closest side, are in the same direction. Calculate the force on each side of the coil from the straight wire, and hence find the total force on the coil. You can leave your answers expressed as a function of Ho