Q.4 (20 marks)- A 10-hp 200-V series de motor has both the armature resistance and series field resistance of 0.1 N each. At full load, the current input is 50

A, and the rated speed is 1040 rpm. Its magnetization curve is shown below. Both the core losses and mechanical losses are 230 W each at full load. You may use reasonable assumptions to determine/ answer the following: (a) the efficiency of the motor at full load. (3 marks) (b) Converted power. (5 marks) (c) The speed of the machine if it is operating at an armature current of 38 A. (3 marks) (d) efficiency of the motor if it is operating at an armature current of 35 A. (5 marks) (e) Which parameters will change roughly if this motor is connected as a shunt motor? (4 marks)