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. |
A single phase half bridge inverter has load R = 2 Ω and a dc voltage source Vs/2 = 115 V. Find the power delivered to the load due to the fundamental component. |
| A. | 536 kW |
| B. | 53.61 kW |
| C. | 5.361 kW |
| D. | 536 W |
| Answer» D. 536 W | |
| 2. |
A single phase half bridge inverter has load R = 2 Ω and a dc voltage source Vs/2 = 115 V. Find the rms value of the fundamental load current. |
| A. | 10.25 A |
| B. | 51.7 A |
| C. | 86 A |
| D. | 24.8 A |
| Answer» C. 86 A | |
| 3. |
A single phase half bridge inverter has a dc voltage source Vs/2 = 115 V. Find the rms value of the fundamental component of output voltage. |
| A. | 510 V |
| B. | 103.5 V |
| C. | 120 V |
| D. | 96 V |
| Answer» C. 120 V | |
| 4. |
The fundamental component of output voltage for a full wave bridge inverter is given by |
| A. | (2Vs/π) sinωt |
| B. | (4Vs/π) sinωt |
| C. | (Vs/2π) sinωt |
| D. | (Vs) |
| Answer» C. (Vs/2π) sinωt | |
| 5. |
The fundamental component of output voltage for a half wave bridge inverter is given by |
| A. | (4Vs/π) sinωt |
| B. | (2Vs/π) sinωt |
| C. | (Vs/2π) sinωt |
| D. | (Vs) |
| Answer» C. (Vs/2π) sinωt | |
| 6. |
For a half wave bridge inverter, the output voltage |
| A. | Vo = – Vs/2 for 0 < t < T/2 |
| B. | Vo = – Vs/2 for T/2< t<T |
| C. | Vo = – Vs for 0 < t < T/2 |
| D. | Vo = Vs/2 for T/2< t < T |
| Answer» C. Vo = – Vs for 0 < t < T/2 | |
| 7. |
For a full wave bridge inverter, the output voltage (Vo) |
| A. | Vo = Vs/2 for 0 < t < T/2 |
| B. | Vo = Vs for 0 < t <T/2 |
| C. | Vo = Vs for T/2< t < T |
| D. | Vo = -Vs for T/2< t < 3T/2 |
| Answer» C. Vo = Vs for T/2< t < T | |
| 8. |
In the following circuit, the diodes D1 to D4 are used to |
| A. | reduce the switching losses |
| B. | send current back to the dc source when SCRs are off |
| C. | send current back to the load when SCRs are off |
| D. | send current back to the dc source when SCRs are conducting |
| Answer» C. send current back to the load when SCRs are off | |
| 9. |
In a single phase full wave bridge inverter, when the output is Vs or –Vs |
| A. | one SCR and one diode are conducting |
| B. | four SCRs are conducting |
| C. | two SCRs are conducting |
| D. | two diodes are conducting |
| Answer» D. two diodes are conducting | |
| 10. |
The output voltage from a single phase full wave bridge inverter varies from |
| A. | Vs to –Vs |
| B. | Vs to zero |
| C. | Vs/2 to zero |
| D. | –Vs/2 to Vs/2 |
| Answer» B. Vs to zero | |