MCQOPTIONS
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MCQOPTIONS
This section includes 17 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. |
In waveguide dispersion, refractive index is independent of ______________ |
| A. | Bit rate |
| B. | Index difference |
| C. | Velocity of medium |
| D. | Wavelength |
| Answer» E. | |
| 2. |
The optical source used in a fiber is an injection laser with a relative spectral width σλ/λ of 0.0011 at a wavelength of 0.70μm. Estimate the RMS spectral width. |
| A. | 1.2 nm |
| B. | 1.3 nm |
| C. | 0.77 nm |
| D. | 0.98 nm |
| Answer» D. 0.98 nm | |
| 3. |
What is pulse dispersion per unit length if for a graded index fiber, 0.1μs pulse broadening is seen over a distance of 13 km? |
| A. | 6.12ns/km |
| B. | 7.69ns/km |
| C. | 10.29ns/km |
| D. | 8.23ns/km |
| Answer» C. 10.29ns/km | |
| 4. |
A multimode graded index fiber exhibits a total pulse broadening of 0.15μsover a distance of 16 km. Estimate the maximum possible bandwidth, assuming no intersymbol interference. |
| A. | 4.6 MHz |
| B. | 3.9 MHz |
| C. | 3.3 MHz |
| D. | 4.2 MHz |
| Answer» D. 4.2 MHz | |
| 5. |
The maximum bit rate that may be obtained on an optical fiber link is 1/3Γ. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
For no overlapping of light pulses down on an optical fiber link, the digital bit rate BT must be ___________ |
| A. | Less than the reciprocal of broadened pulse duration |
| B. | More than the reciprocal of broadened pulse duration |
| C. | Same as that of than the reciprocal of broadened pulse duration |
| D. | Negligible |
| Answer» B. More than the reciprocal of broadened pulse duration | |
| 7. |
CHROMATIC_DISPERSION_IS_ALSO_CALLED_AS_INTERMODAL_DISPERSION._STATE_TRUE_OR_FALSE?$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
In waveguide dispersion, refractive index is independent of$ |
| A. | Bit rate |
| B. | Index difference |
| C. | Velocity of medium |
| D. | Wavelength |
| Answer» E. | |
| 9. |
The_optical_source_used_in_a_fiber_is_an_injection_laser_with_a_relative_spectral_width_σλ/λ_of_0.0011_at_a_wavelength_of_0.70μm._Estimate_the_RMS_spectral_width.$# |
| A. | 1.2 nm |
| B. | 1.3 nm |
| C. | 0.77 nm |
| D. | 0.98 nm |
| Answer» D. 0.98 nm | |
| 10. |
Chromatic dispersion is also called as intermodal dispersion. State whether the given statement true or false? |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
What is pulse dispersion per unit length if for a graded index fiber, 0.1μs pulse broadening is seen over a distance of 13 km?$ |
| A. | 6.12ns/km |
| B. | 7.69ns/km |
| C. | 10.29ns/km |
| D. | 8.23ns/km |
| Answer» C. 10.29ns/km | |
| 12. |
A multimode graded index fiber exhibits a total pulse broadening of 0.15μsover a distance of 16 km. Estimate the maximum possible bandwidth, assuming no intersymbol interference.$ |
| A. | 4.6 MHz |
| B. | 3.9 MHz |
| C. | 3.3 MHz |
| D. | 4.2 MHz |
| Answer» D. 4.2 MHz | |
| 13. |
3dB optical bandwidth is always ___________ the 3dB electrical bandwidth. |
| A. | Smaller than |
| B. | Larger than |
| C. | Negligible than |
| D. | Equal to |
| Answer» C. Negligible than | |
| 14. |
The maximum bit rate that may be obtained on an optical fiber link is 1/3Γ. State whether the given statement is true or false.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 15. |
For no overlapping of light pulses down on an optical fiber link, the digital bit rate BT must be: |
| A. | Less than the reciprocal of broadened pulse duration |
| B. | More than the reciprocal of broadened pulse duration |
| C. | Same as that of than the reciprocal of broadened pulse duration |
| D. | Negligible |
| Answer» B. More than the reciprocal of broadened pulse duration | |
| 16. |
What does ISI stands for in optical fiber communication? |
| A. | Invisible size interference |
| B. | Infrared size interference |
| C. | Inter-symbol interference |
| D. | Inter-shape interference |
| Answer» D. Inter-shape interference | |
| 17. |
What is dispersion in optical fiber communication? |
| A. | Compression of light pulses |
| B. | Broadening of transmitted light pulses along the channel |
| C. | Overlapping of light pulses on compression |
| D. | Absorption of light pulses |
| Answer» C. Overlapping of light pulses on compression | |