MCQOPTIONS
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MCQOPTIONS
This section includes 57 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The random motion of holes and free electrons due to thermal agitation is called ___________ |
| A. | Diffusion |
| B. | Pressure |
| C. | Ionisation |
| D. | None of the above |
| Answer» B. Pressure | |
| 52. |
The strength of a semiconductor crystal comes from |
| A. | Forces between nuclei |
| B. | Forces between protons |
| C. | Electron-pair bonds |
| D. | None of the above |
| Answer» D. None of the above | |
| 53. |
A forward biased pn junction diode has a resistance of the order of |
| A. | Ω |
| B. | kΩ |
| C. | MΩ |
| D. | None of the above |
| Answer» B. k≈í¬© | |
| 54. |
At room temperature, an intrinsic silicon crystal acts approximately as |
| A. | A battery |
| B. | A conductor |
| C. | An insulator |
| D. | A piece of copper wire |
| Answer» D. A piece of copper wire | |
| 55. |
A hole in a semiconductor is defined as ___________ |
| A. | A free electron |
| B. | The incomplete part of an electron pair bond |
| C. | A free proton |
| D. | A free neutron |
| Answer» C. A free proton | |
| 56. |
In a semiconductor, current conduction is due to |
| A. | Only holes |
| B. | Only free electrons |
| C. | Holes and free electrons |
| D. | None of the above |
| Answer» D. None of the above | |
| 57. |
A trivalent impurity has valence electrons |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 3 |
| Answer» E. | |