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. |
In single-phase modulation of PWM inverters, the pulse width is 120 . For an input voltage of 220 V dc, the rms value of output voltage is |
| A. | 185 V |
| B. | 254 V |
| C. | 127 V |
| D. | 179 V |
| Answer» E. | |
| 2. |
In case of sinusoidal pulse width modulation with MI < 1, if the number of pulses per half cycle (N) = 6, then |
| A. | harmonics of order 7 and 9 become significant |
| B. | harmonics of order 7 and 9 are eliminated |
| C. | harmonics of order 11 and 13 become significant |
| D. | harmonics of order 11 and 13 are eliminated |
| Answer» D. harmonics of order 11 and 13 are eliminated | |
| 3. |
In case of sinusoidal pulse width modulation with MI < 1, the order of the dominate harmonic can be raised by |
| A. | increasing the number of pulses |
| B. | reducing the number of pulses |
| C. | lowering the input voltage frequency |
| D. | raising the input voltage frequency |
| Answer» B. reducing the number of pulses | |
| 4. |
In case of sinusoidal pulse width modulation with MI < 1, if the number of pulses per half cycle (N) = 5, then |
| A. | harmonics of order 5 and 7 become significant |
| B. | harmonics of order 5 and 7 are eliminated |
| C. | harmonics of order 9 and 11 become significant |
| D. | harmonics of order 9 and 11 are eliminated |
| Answer» D. harmonics of order 9 and 11 are eliminated | |