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. |
For an SCR in the forward blocking mode (practically) |
| A. | leakage current does not flow |
| B. | leakage current flows from anode to cathode |
| C. | leakage current flows from cathode to anode |
| D. | leakage current flows from gate to anode |
| Answer» C. leakage current flows from cathode to anode | |
| 2. |
With the anode positive with respect to the cathode & the gate circuit open, the SCR is said to be in the |
| A. | reverse blocking mode |
| B. | reverse conduction mode |
| C. | forward blocking mode |
| D. | forward conduction mode |
| Answer» D. forward conduction mode | |
| 3. |
For an SCR in the reverse blocking mode, (practically) |
| A. | leakage current does not flow |
| B. | leakage current flows from anode to cathode |
| C. | leakage current flows from cathode to anode |
| D. | leakage current flows from gate to anode |
| Answer» D. leakage current flows from gate to anode | |
| 4. |
If the cathode of an SCR is made positive with respect to the anode & no gate current is applied then |
| A. | all the junctions are reversed biased |
| B. | all the junctions are forward biased |
| C. | only the middle junction is forward biased |
| D. | only the middle junction is reversed biased |
| Answer» D. only the middle junction is reversed biased | |
| 5. |
The static V-I curve for the SCR is plotted for |
| A. | Ia (anode current) vs Ig (gate current), Va (anode – cathode voltage) as a parameter |
| B. | Ia vs Va with Ig as a parameter |
| C. | Va vs Ig with Ia as a parameter |
| D. | Ig vs Vg with Ia as a parameter |
| E. | as a parameterb) Ia vs Va with Ig as a parameterc) Va vs Ig with Ia as a parameterd) Ig vs Vg with Ia as a parameter |
| Answer» C. Va vs Ig with Ia as a parameter | |
| 6. |
In the SCR structure the gate terminal is located |
| A. | near the anode terminal |
| B. | near the cathode terminal |
| C. | in between the anode & cathode terminal |
| D. | none of the mentioned |
| Answer» C. in between the anode & cathode terminal | |
| 7. |
Choose the false statement. |
| A. | SCR is a bidirectional device |
| B. | SCR is a controlled device |
| C. | In SCR the gate is the controlling terminal |
| D. | SCR are used for high-power applications |
| Answer» B. SCR is a controlled device | |
| 8. |
An SCR is a |
| A. | four layer, four junction device |
| B. | four layer, three junction device |
| C. | four layer, two junction device |
| D. | three layer, single junction device |
| Answer» C. four layer, two junction device | |
| 9. |
Which terminal does not belong to the SCR? |
| A. | Anode |
| B. | Gate |
| C. | Base |
| D. | Cathode |
| Answer» D. Cathode | |
| 10. |
A thyristor (SCR) is a |
| A. | P-N-P device |
| B. | N-P-N device |
| C. | P-N-P-N device |
| D. | P-N device |
| Answer» D. P-N device | |