A rectangular coil consists of n = closely wrapped turns and has dimensions a = m and c = m. The coil is hinged along the y axis, and its plane makes an angle th = with the x axis (Fig. P29.51). (a) What is the magnitude of the torque exerted on the coil by a uniform magnetic field b = T directed in the positive x direction when the current is i = A in the direction shown? (b) What is the expected direction of rotation of the coil?