MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Optical Communication knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The use of low impedance driving circuit may increase _____________ |
| A. | Noise |
| B. | Width |
| C. | Intensity |
| D. | Switching speed |
| Answer» E. | |
| 2. |
Extinction ratio is denoted by symbol __________ |
| A. | ε |
| B. | σ |
| C. | β |
| D. | ρ |
| Answer» B. σ | |
| 3. |
The coherent emission from an injection laser has a line width of ________ |
| A. | 2 nm |
| B. | 3nm |
| C. | 8 nm |
| D. | 1nm |
| Answer» E. | |
| 4. |
The finite spectral width of the optical source causes ___________ |
| A. | Depletion |
| B. | Frequency burst |
| C. | Pulse broadening |
| D. | Efficient reflection |
| Answer» D. Efficient reflection | |
| 5. |
The _________ of the LED is twice that of the effective minority carrier lifetime. |
| A. | Dwell time |
| B. | Reflection scatters |
| C. | Sensitivity |
| D. | Rise time |
| Answer» E. | |
| 6. |
Optical output power from an LED is directly proportional to the device junction temperature. |
| A. | False |
| B. | True |
| Answer» C. | |
| 7. |
Which behaviour may prove as a limitation for injection lasers and LED’s? |
| A. | Isotropic |
| B. | Radioactive |
| C. | Thermal |
| D. | Photosensitive |
| Answer» D. Photosensitive | |
| 8. |
LED’s display good linearity. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
THE_FINITE_SPECTRAL_WIDTH_OF_THE_OPTICAL_SOURCE_CAUSES____________?$ |
| A. | Depletion |
| B. | Frequency burst |
| C. | Pulse broadening |
| D. | Efficient reflection |
| Answer» D. Efficient reflection | |
| 10. |
Extinction ratio is denoted by symbol __________$ |
| A. | ε |
| B. | σ |
| C. | β |
| D. | ρ |
| Answer» B. ‚âà√¨‚àö√¢ | |
| 11. |
The_coherent_emission_from_an_injection_laser_has_a_line_width_of_________$ |
| A. | 2 nm |
| B. | 3nm |
| C. | 8 nm |
| D. | 1nm |
| Answer» E. | |
| 12. |
The_use_of_low_impedance_driving_circuit_may_increase______________ |
| A. | Noise |
| B. | Width |
| C. | Intensity |
| D. | Switching speed |
| Answer» E. | |
| 13. |
The _________ of the LED is twice that of the effective minority carrier lifetime? |
| A. | Dwell time |
| B. | Reflection scatters |
| C. | Sensitivity |
| D. | Rise time |
| Answer» E. | |
| 14. |
_____________ from the LED is dependent on the effective minority carrier lifetime in the semiconductor material. |
| A. | Spontaneous emission |
| B. | Stimulated emission |
| C. | Absorption |
| D. | Diffusion |
| Answer» B. Stimulated emission | |
| 15. |
Optical output power from an LED is directly proportional to the device junction temperature. State whether the given statement is true or false. |
| A. | False |
| B. | True |
| Answer» C. | |
| 16. |
Which behaviour may prove as a limitation for injection lasers and LED’s?$ |
| A. | Isotropic |
| B. | Radioactive |
| C. | Thermal |
| D. | Photosensitive |
| Answer» D. Photosensitive | |
| 17. |
LED’s display good linearity. State whether the given statement is true or false.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 18. |
_____________ are capable of launching powers between 0.5 and several mW. |
| A. | LED’s |
| B. | Injection laser |
| C. | Attenuator |
| D. | Reflector |
| Answer» C. Attenuator | |
| 19. |
Coherent radiation is relatively __________ |
| A. | Parabolic |
| B. | Elliptic |
| C. | Directional |
| D. | Rectangular |
| Answer» D. Rectangular | |
| 20. |
_____________ must be operated in stimulated emission region. |
| A. | Injection laser |
| B. | LED’s |
| C. | Detector |
| D. | Receiver |
| Answer» B. LED‚Äö√Ñ√∂‚àö√ë‚àö¬•s | |