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. |
In a single phase full converter, for discontinuous load current and extinction angle > , each SCR conducts for |
| A. | |
| B. | |
| C. | - |
| D. | + |
| Answer» D. + | |
| 2. |
A single phase full converter feeds power to a RLE load with R = 6 and E = 60 V. Find the average value of the load current when the supply voltage is 230 V rms AC and a firing angle = 50 . |
| A. | 0 |
| B. | 3.9A |
| C. | 12.1 A |
| D. | 6.05 A |
| Answer» D. 6.05 A | |
| 3. |
A single phase full controlled bridge converter is connected to load having R = 0.4 , E = 120, L = 0.2 mH, Vs = 230V. The RMS value of load current is 10 A for a firing angle of 53.21 . Find the input power factor. |
| A. | 0.5043 lag |
| B. | 0.5391 lag |
| C. | 0.6120 lag |
| D. | Unity |
| Answer» C. 0.6120 lag | |
| 4. |
A single-phase full converter bridge, is connected to a RLE load. The source has a rms voltage of 230 V and the average load current is 10 A. Find the firing angle for which the power flows from the DC load to the AC source. Consider E = 120 V, R = 0.4 , L = 2 Henry. |
| A. | 124 |
| B. | 153 |
| C. | 142 |
| D. | 309 |
| Answer» B. 153 | |
| 5. |
A single-phase full converter bridge, is connected to a RLE load. The source has a rms voltage of 230 V and the average load current is 10 A. Find the firing angle for which the power flows from AC source to the DC load. Consider E = 120 V, R = 0.4 . |
| A. | 26.4 |
| B. | 53.2 |
| C. | 142 |
| D. | 39 |
| Answer» C. 142 | |