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. |
In case of a single-pulse width modulation with the pulse width = 2d, to eliminate the 3rd harmonic from the output voltage waveform, the value of the pulse width (2d) must be |
| A. | 0° |
| B. | 60° |
| C. | 120° |
| D. | must bea) 0°b) 60°c) 120°d) 180° |
| Answer» D. must bea) 0°b) 60°c) 120°d) 180° | |
| 2. |
Find the peak value of the fundamental component of voltage with a pulse width of 2d = 90 and Vs = 240 V for single-pulse modulation in a full wave bridge inverter. |
| A. | 305 V |
| B. | 216 V |
| C. | 0 V |
| D. | 610 V |
| Answer» C. 0 V | |
| 3. |
In case of a single-pulse width modulation with the pulse width = 2d, to eliminate the nth harmonic from the output voltage |
| A. | d = π |
| B. | 2d = π |
| C. | nd = π |
| D. | nd = 2π |
| Answer» D. nd = 2π | |
| 4. |
In case of a single-pulse width modulation with the pulse width = 2d, the peak value of the fundamental component of voltage is given by the expression |
| A. | 4Vs/π |
| B. | Vs |
| C. | (4Vs/π) sin 2d |
| D. | (4Vs/π) sin d |
| Answer» E. | |
| 5. |
In the single-pulse width modulation method, when the pulse width of 2d is equal to its maximum value of π radians, then the fundamental component of output voltage is given by |
| A. | Vs |
| B. | 4Vs/π |
| C. | 0 |
| D. | 2Vs/π |
| Answer» C. 0 | |
| 6. |
In the single-pulse width modulation method, the Fourier coefficient an is given by |
| A. | (Vs/π) [ cos(nπ/2) cos(nd) ]. |
| B. | 0 |
| C. | (4Vs/nπ) [sin(nπ/2) sin(nd)].d) (2Vs/nπ) [sin(nπ/2) sin(n |
| D. | ].b) 0c) (4Vs/nπ) [sin(nπ/2) sin(nd)].d) (2Vs/nπ) [sin(nπ/2) sin(nd)]. |
| Answer» C. (4Vs/nπ) [sin(nπ/2) sin(nd)].d) (2Vs/nπ) [sin(nπ/2) sin(n | |
| 7. |
In the single-pulse width modulation method, the Fourier coefficient bn is given by |
| A. | (Vs/π) [ sin(nπ/2) sin(nd) ]. |
| B. | 0 |
| C. | (4Vs/nπ) [sin(nπ/2) sin(nd)].d) (2Vs/nπ) [sin(nπ/2) sin(n |
| D. | ].b) 0c) (4Vs/nπ) [sin(nπ/2) sin(nd)].d) (2Vs/nπ) [sin(nπ/2) sin(nd)]. |
| Answer» D. ].b) 0c) (4Vs/nπ) [sin(nπ/2) sin(nd)].d) (2Vs/nπ) [sin(nπ/2) sin(nd)]. | |
| 8. |
The shape of the output voltage waveform in a single PWM is |
| A. | square wave |
| B. | triangular wave |
| C. | quasi-square wave |
| D. | sine wave |
| Answer» D. sine wave | |
| 9. |
In the single-pulse width modulation method, the output voltage waveform is symmetrical about ____________ in the negative half cycle. |
| A. | 2π |
| B. | 3π/2 |
| C. | π/2 |
| D. | 3π/4 |
| Answer» C. π/2 | |
| 10. |
In the single-pulse width modulation method, the output voltage waveform is symmetrical about __________ |
| A. | π |
| B. | 2π |
| C. | π/2 |
| D. | π/4 |
| Answer» D. π/4 | |