MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Optical Communications knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Metal-semiconductor-metal (MSM) photo-detectors are photoconductive detectors. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Waveguide structure provides high quantum efficiency. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Waveguide phototransistors utilize a ___________ waveguide layer under the _________ transistor region. |
| A. | Active, passive |
| B. | Passive, active |
| C. | Homo, hetero |
| D. | Hetero, homo |
| Answer» C. Homo, hetero | |
| 4. |
The _____________ at emitter-base junction gives good emitter base injection efficiency. |
| A. | Homo-junction |
| B. | Depletion layer |
| C. | Holes |
| D. | Hetero-junction |
| Answer» E. | |
| 5. |
The n-p-n hetero-junction phototransistor is grown using ______________ |
| A. | Liquid-phase tranquilizers |
| B. | Liquid-phase epistaxis |
| C. | Solid substrate |
| D. | Hetero poleax |
| Answer» C. Solid substrate | |
| 6. |
The detection mechanism in the ____________ photo-detector includes inter sub-band transitions. |
| A. | Dwell |
| B. | Set |
| C. | Avalanche |
| D. | Futile |
| Answer» B. Set | |
| 7. |
For a phototransistor having gain of 116.5, wavelength of 1.28 m, optical power 123 W. Determine collector current. |
| A. | 0.123 mA |
| B. | 0.0149 mA |
| C. | 1.23 mA |
| D. | 0.54 mA |
| Answer» C. 1.23 mA | |
| 8. |
A phototransistor has collector current of 18 mA, incident optical power of 128 W with a wavelength of 1.24 m. Determine an optical gain. |
| A. | 1.407 *10<sup>2</sup> |
| B. | 19.407 *10<sup>2</sup> |
| C. | 2.407 *10<sup>2</sup> |
| D. | 3.407 *10<sup>2</sup> |
| Answer» B. 19.407 *10<sup>2</sup> | |
| 9. |
The _____________ is photosensitive to act as light gathering element. |
| A. | Base-emitter junction |
| B. | Base-collector junction |
| C. | Collector-emitter junction |
| D. | Base-collector junction and Base-emitter junction |
| Answer» B. Base-collector junction | |