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1. The efficiency of a chopper circuit is about





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MCQ->Assertion (A): If the duty cycle of chopper is low the current would not become discontinuousReason (R): If the time constant L/R of the load in chopper is low the current may become discontinuous.

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MCQ->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....
MCQ->Assertion (A): Chopper always requires forced commutationReason (R): Morgan chopper uses a saturable reactor.

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MCQ->Assertion (A): A class C chopper can operate in first and second quadrants Reason (R): A class B chopper operates only in second quadrant.

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