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. |
By controlling the modulation index (MI), __________ can be controlled. |
| A. | gain |
| B. | output frequency |
| C. | harmonic content of the output voltage |
| D. | cosine component of the output voltage |
| Answer» D. cosine component of the output voltage | |
| 2. |
The modulation index (MI) is given byVr = peak value of the reference wave.Vc = peak value of the carrier wave. |
| A. | Vr/Vc |
| B. | Vc/Vr |
| C. | (1 + Vc/Vr) |
| D. | 1/(Vc Vr) |
| Answer» B. Vc/Vr | |
| 3. |
In PWM, the comparator output is further given to a ____________ |
| A. | integrator |
| B. | scr devices |
| C. | trigger pulse generator |
| D. | snubber circuit |
| Answer» D. snubber circuit | |
| 4. |
In sinusoidal pulse width modulation, the comparator output is high when the |
| A. | triangular wave has magnitude higher than the sinusoidal wave |
| B. | sinusoidal wave has magnitude higher than the triangular wave |
| C. | triangular wave has magnitude equal to the sinusoidal wave |
| D. | none of the mentioned |
| Answer» C. triangular wave has magnitude equal to the sinusoidal wave | |
| 5. |
In the sinusoidal pulse width modulation, ____________ is the reference wave signal. |
| A. | square wave |
| B. | triangular wave |
| C. | sinusoidal wave |
| D. | quasi-square wave |
| Answer» D. quasi-square wave | |
| 6. |
In the sinusoidal pulse width modulation, __________ is the carrier wave signal. |
| A. | square wave |
| B. | triangular wave |
| C. | sinusoidal wave |
| D. | quasi-square wave |
| Answer» C. sinusoidal wave | |
| 7. |
In sinusoidal pulse width modulation, __________ wave is compared with a ___________ type of wave. |
| A. | square, sinusoidal |
| B. | sinusoidal, triangular |
| C. | sinusoidal, quasi-square |
| D. | none of the mentioned |
| Answer» C. sinusoidal, quasi-square | |
| 8. |
In ___________ type of modulation method, the pulse width is not equal for all the pulses. |
| A. | multiple pulse width modulation |
| B. | single pulse width modulation |
| C. | sinusoidal pulse width modulation |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 9. |
In MPM, ____________ order harmonics can be eliminated by a proper choice of __________ and _________ |
| A. | higher, d, ɣ |
| B. | lower, d, ɣ |
| C. | higher and lower, d, ɣ |
| D. | none of the mentioned |
| Answer» E. | |
| 10. |
In the multiple pulse width modulation method, the firing pulses are generate during the interval when the |
| A. | triangular wave exceeds the square modulating wave |
| B. | square modulating wave exceeds the triangular wave |
| C. | square wave amplitude is same as the triangular wave’s amplitude |
| D. | none of the mentioned |
| Answer» B. square modulating wave exceeds the triangular wave | |