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_THE_EQUILIBRIUM_STATE,_THE_BARRIER_POTENTIAL_ACROSS_A_UNBIASED_SILICON_DIODE_IS__________?$ |
| A. | 0.3 V |
| B. | 0.7 V |
| C. | 1.3 V |
| D. | 0 V |
| Answer» C. 1.3 V | |
| 2. |
In_the_equilibrium_state_the_barrier,_potential_across_a_unbiased_germanium_diode_is___________$ |
| A. | 0.3 V |
| B. | 0.7 V |
| C. | 1.7 V |
| D. | 0 V |
| Answer» B. 0.7 V | |
| 3. |
In case of a practical p-n junction diode, the rise in the junction temperature __________? |
| A. | decreases the width of the depletion region |
| B. | increases the barrier potential |
| C. | increases the width of the depletion region |
| D. | width of the depletion region increases but the barrier potential remains constant |
| Answer» B. increases the barrier potential | |
| 4. |
When the p-n junction diode is reversed biased, the width of the depletion region __________ |
| A. | increases |
| B. | decreases |
| C. | remains Constant |
| D. | none of the above mentioned |
| Answer» B. decreases | |
| 5. |
When the p-n junction diode is forward biased, the width of the depletion region __________ |
| A. | increases |
| B. | decreases |
| C. | remains Constant |
| D. | increases than Decreases |
| Answer» C. remains Constant | |
| 6. |
In an AC-DC converter, a diode might be used as a |
| A. | voltage source |
| B. | phase angle controller |
| C. | freewheeling Diode |
| D. | filter |
| Answer» D. filter | |
| 7. |
For a p-n junction diode, the peak inverse current & the reverse recovery time are dependent on |
| A. | inverse voltage |
| B. | forward Voltage |
| C. | di/dt |
| D. | all of the above mentioned |
| Answer» D. all of the above mentioned | |
| 8. |
Even after the forward current reduces to zero value, a practical diode continues to conduct in the reverse direction for a while due to the |
| A. | resistance of the diode |
| B. | high junction temperature |
| C. | stored charges in the depletion region |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 9. |
The power loss in which of the following cases would be the maximum? |
| A. | When both V & I are minimum |
| B. | When both V & I are maximum |
| C. | When only V is maximum |
| D. | When only I is maximum |
| Answer» C. When only V is maximum | |
| 10. |
If V & I are the forward voltage & current respectively, then the power loss across the diode would be |
| A. | V/I |
| B. | V<sup>2</sup> I<sup>2</sup> |
| C. | I<sup>2</sup> V |
| D. | VI |
| Answer» E. | |