MCQOPTIONS
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MCQOPTIONS
This section includes 4 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. |
A step down chopper has Vs = 220 V and is connected to RLE load. With R = 1 , E = 24 V and L = 5 mH. The chopping period is 2000 s and the on-period is 600 s. Find the value of minimum steady state output current. |
| A. | 33 A |
| B. | 42 A |
| C. | 0 A |
| D. | 51 A |
| Answer» E. | |
| 2. |
A type A step down chopper has Vs = 220 V and is connected to RLE load. With R = 1 , E = 24 V and L large enough to maintain continuous conduction. Find the average value of load current for a duty cycle of 30 %. |
| A. | 100 A |
| B. | 22 A |
| C. | 42 A |
| D. | 16.5 A |
| Answer» D. 16.5 A | |
| 3. |
The expression for the thyristor (chopper switch) current is given byI = ( 2.Vs E)/R |
| A. | nFind the value of firing angle , for which the thyristor current is maximum. |
| B. | 2Vs/ |
| C. | 180 |
| D. | E/2Vs |
| E. | Vs/R |
| Answer» D. E/2Vs | |
| 4. |
Find the expression for the ripple factor in terms of duty cycle for a type A step down chopper |
| A. | (1- / ) |
| B. | <sup>2</sup>/2 |
| C. | /2 |
| D. | (1- ) |
| Answer» B. <sup>2</sup>/2 | |