1. Here let's analyze the demo from lecture with two parallel wires. a) We will start with the case that the currents IR and I are in the same direction: l IL IR If the length of the wires is much greater than the distance between the wires (l >> d), find an approximate expression for the magnetic force on each wire. Are the forces attractive or repulsive? b) What would happen to the direction of the forces if you switched the direction of IR or IL? Make sure to explain your answer.