MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Power Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For a step-up/step-down chopper, if (duty cycle) = 0.5 then |
| A. | Vo = Vs |
| B. | Vo < Vs |
| C. | Vo > Vs |
| D. | none of the mentioned |
| Answer» B. Vo < Vs | |
| 2. |
A step down chopper has input dc voltage of 220 V and R = 10 in series with L = 65 mH. If the load current varies linearly between 11 A and 17 A, then find the duty cycle . |
| A. | 1 |
| B. | 0.4 |
| C. | 0.6 |
| D. | 0.7 |
| Answer» E. | |
| 3. |
A step down chopper has Vs = 230 V and R = 10 . For a duty cycle of 0.4, the power taken by the chopper is 2097 Watts. Find the chopper efficiency. Take the voltage drop across the chopper switch as 2 V. |
| A. | 98 % |
| B. | 89.96 % |
| C. | 99.14 % |
| D. | 96.54 % |
| Answer» D. 96.54 % | |
| 4. |
For a step-up/step-down chopper, if the duty cycle > 0.5 then |
| A. | Vo = Vs |
| B. | Vo < Vs |
| C. | Vo > Vs |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 5. |
The expression for a step-up/step-down chopper with as the duty cycle and Vs as the dc input voltage is |
| A. | Vs/1 |
| B. | x Vs |
| C. | Vs ( /1- ) |
| D. | Vs ( /1+ ) |
| Answer» D. Vs ( /1+ ) | |