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Question
A separately excited dc motor is run from a dc source through a chopper. At 600 rpm and rated torque, the duty cycle of chopper is 0.8. At 600 rpm and half the rated torque, the duty cycle is likely to be
Options:
A .  0.9
B .  0.8
C .  0.75
D .  0.6
Answer: Option C
Answer: (c).0.75

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