Q. 57 A 220 20 , 1000VA rpm, separately excited dc motor has an armature resistance of 
.. The motor is controlled by a step down chopper with a frequency of 1kHz. The input dc voltage to the chopper is 250 V. The duty cycle of the chopper for the motor to operate at a speed of 600 rpm delivering the rated torque will be
(A) 0.518
(B) 0.608
(C) 0.852
(D) 0.902
Answer:(*)
Explanation:
Not Required.
