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In DC chopper, the waveform for input and output voltages is respectively __________(a) Discontinuous and Continuous(b) Continuous and Discontinuous(c) Both continuous(d) Both discontinuousThis question was posed to me by my school principal while I was bunking the class.I want to ask this question from Modified Speed Torque Characteristics of DC Shunt Motors in chapter Characteristics of DC & AC Motors of Electric Drives

Answer»

Correct CHOICE is (b) CONTINUOUS and Discontinuous

Easiest explanation: Chopper has a perfect DC at the input which is chopped into pulses which MEANS the OUTPUT voltage is discontinuous and by varying the DUTY cycle we can vary the average output voltage.



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