A ward leonard system is applied to control speed of a separately excited dc motor as below figure. The prime mover provides mechanical power with constant speed (n) of 1500 rpm. When varying the field current l at a certain value of the dc generator, the k=0.05 V/rpm (Hint: E1= kn). The generator armature resistance ra=0.1 ohms. The field current If2 is kept constant at rated value resulting in k -0.1 V/rpm. The motor armature resistance ra2=0.1 ohms. The motor draws armature current (1) of 20 A. Ta2 Tal Ia T, W Eal V. a equivalent circuit (a) Find terminal voltage of the dc motor (V). (b) Find the speed (n) of the dc motor. (c) The electromagnetic torque of the dc motor. Ea2 T2, W2 f2