MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
Find the output voltage expression for a step down chopper with Vs as the input voltage and α as the duty cycle. |
| A. | Vo = Vs/α |
| B. | Vo = Vs x α |
| C. | Vo = Vs2/α |
| D. | Vo = 2Vs/απ |
| Answer» C. Vo = Vs2/α | |
| 2. |
If T is the time period for a chopper circuit and α is its duty cycle, then the chopping frequency is |
| A. | Ton/α |
| B. | Toff/α |
| C. | α/Toff |
| D. | α/Ton |
| Answer» E. | |
| 3. |
The values of duty cycle (α) lies between |
| A. | 0<α<1 |
| B. | 0>α>-1 |
| C. | 0<=α<=1 |
| D. | 1<α<100 |
| Answer» D. 1<α<100 | |
| 4. |
The load voltage of a chopper can be controlled by varying the |
| A. | duty cycle |
| B. | firing angle |
| C. | reactor position |
| D. | extinction angle |
| Answer» B. firing angle | |
| 5. |
What is the duty cycle of a chopper ? |
| A. | Ton/Toff |
| B. | Ton/T |
| C. | T/Ton |
| D. | Toff x Ton |
| Answer» C. T/Ton | |
| 6. |
A chopper is a |
| A. | Time ratio controller |
| B. | AC to DC converter |
| C. | DC transformer |
| D. | High speed semiconductor switch |
| Answer» E. | |
| 7. |
Which device can be used in a chopper circuit? |
| A. | BJT |
| B. | MOSFET |
| C. | GTO |
| D. | All of the mentioned |
| Answer» E. | |
| 8. |
A chopper may be thought as a |
| A. | Inverter with DC input |
| B. | DC equivalent of an AC transformer |
| C. | Diode rectifier |
| D. | DC equivalent of an induction motor |
| Answer» C. Diode rectifier | |
| 9. |
Choppers converter |
| A. | AC to DC |
| B. | DC to AC |
| C. | DC to DC |
| D. | AC to AC |
| Answer» D. AC to AC | |
| 10. |
In the ___________ type of chopper, two stage conversions takes place. |
| A. | AC-DC |
| B. | AC link |
| C. | DC link |
| D. | None of the mentioned |
| Answer» B. AC link | |