Question 1:

B A rod of length I = 25 cm and mass m = 45 g lies on a plane inclined at 0 = 40 to the horizontal, as shown in the figure above. A current enters and leaves the rod via light flexible wires which we ignore. For what current magnitude will the rod be in equilibrium in a magnetic field B - 0.27 T? Ignore friction. I A2 B G X A rectangular coil has 17 turns and sides of length a = 30 cm and c = 35 cm. The coil is pivoted about the z axis and its plane is at ( = 35" to a magnetic field B = 0.6i T, as shown in the figure above. If I = 10 A, find: a) the force on each side. F1 =( it k) N li+ k) N F 3 Lit k) N FA kj N b) What is the magnetic moment of the coil? # =1+Jitk) A . m c) What is the torque on the coil? T = ( i+ + k ) N . m