A step-down chopper has input voltage 40 V and output voltage 20 V. Calculate the value of the duty cycle.(a) 0.5(b) 0.2(c) 0.3(d) 0.4I had been asked this question in an online interview.My query is from Solid-State Devices topic in section Introduction to Solid-State Devices of Electric Drives

A step-down chopper has input voltage 40 V and output voltage 20 V. Ca

1.	A step-down chopper has input voltage 40 V and output voltage 20 V. Calculate the value of the duty cycle.(a) 0.5(b) 0.2(c) 0.3(d) 0.4I had been asked this question in an online interview.My query is from Solid-State Devices topic in section Introduction to Solid-State Devices of Electric Drives
Answer» CORRECT option is (a) 0.5 Easy explanation: The OUTPUT voltage of the STEP-down chopper is Vo = Vin×(D). The value of the duty cycle is less than ONE which makes the Vo < Vin. The step-down chopper is used to step down the voltage. The value of the duty cycle is 20÷40 = .5.

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