MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Analog Communications knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What will be the effect on power if the distance between the sidebands and center frequency increases? |
| A. | power decreases |
| B. | power increases |
| C. | power remains same |
| D. | power becomes twice of its previous value |
| Answer» B. power increases | |
| 2. |
What is the full form of NBFM? |
| A. | Narrow band frequency modulation |
| B. | National broadcast frequency modulation |
| C. | Near band frequency modulation |
| D. | Non broadcast frequency modulation |
| Answer» B. National broadcast frequency modulation | |
| 3. |
In FM system, capture effect is observed when an FM receiver switching suddenly between two stations having nearby frequencies. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
FM stereo _________ |
| A. | is implemented using an SCA signal |
| B. | has a higher signal to noise ratio than mono FM |
| C. | is not compatible with mono FM |
| D. | uses DSBSC AM modulation |
| Answer» E. | |
| 5. |
Signal to noise ratio of a frequency modulated system is better than amplitude modulated system. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Which statement is true about direct FM modulator? |
| A. | it integrates the modulating signal |
| B. | it differentiates the modulating signal |
| C. | varies the frequency of carrier oscillator |
| D. | varies the phase of carrier oscillator |
| Answer» D. varies the phase of carrier oscillator | |
| 7. |
What is the full form of ALC? |
| A. | Amplitude Level Control |
| B. | Automatic Level Control |
| C. | Automatic Limiter Control |
| D. | Amplitude Limiter Control |
| Answer» C. Automatic Limiter Control | |
| 8. |
Which statement is true about indirect FM modulator? |
| A. | it integrates the modulating signal |
| B. | it differentiates the modulating signal |
| C. | varies the frequency of carrier oscillator |
| D. | varies the phase of carrier oscillator |
| Answer» E. | |
| 9. |
The time taken by the charge carrier to cross from the emitter to the collector is called ________ |
| A. | miller time |
| B. | transit time |
| C. | charge time |
| D. | relaxing time |
| Answer» C. charge time | |
| 10. |
A resonant circuit is used in narrowband RF amplifiers. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
To generate a SSB signal ________ |
| A. | Full carrier AM is required |
| B. | DSB-SC is required |
| C. | Quadrature signal is required |
| D. | High frequency signal is needed |
| Answer» C. Quadrature signal is required | |
| 12. |
The ability to change the operating frequency rapidly without a lot of retuning is called ________ |
| A. | Agility |
| B. | VCO |
| C. | Mixing |
| D. | Filtering |
| Answer» B. VCO | |
| 13. |
In high level amplitude modulation, power in the sidebands comes from _________ |
| A. | Modulating amplifier |
| B. | RF amplifier |
| C. | Driver stage |
| D. | Carrier |
| Answer» B. RF amplifier | |
| 14. |
The person who sent the first radio signal across the atlantic ocean was ________ |
| A. | Marconi |
| B. | Maxwell |
| C. | Hertz |
| D. | Bell |
| Answer» B. Maxwell | |
| 15. |
What is the use of bypass capacitor? |
| A. | to remove RF from non-RF circuits |
| B. | to couple RF around an amplifier |
| C. | acts as low pass filter |
| D. | acts as high pass filter |
| Answer» B. to couple RF around an amplifier | |