Solve

At time = 0, a rectangular conducting coil with resistance R = 2 0, width w = 3 cm (parallel to the y axis), and length ZL = 8 cm (parallel to the x axis) to the begins to enter a rectangular region with a uniform magnetic field, with length Dg LD. The coil moves at constant velocity vy = 5 cm/s in the +a- direction. The magnetic field is given by B = 1.6 2T, pointing into the screen (negative z-direction). The region of magnetic field has length Dg = 15 cm in the z-direction. What is the force required at time = 0.8 s to maintain this constant velocity? (Assume the coil is partially within the magnetic field at that time.) F(0.8 sec) =