MCQOPTIONS
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MCQOPTIONS
This section includes 11 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. |
Why the bandwidth of an FM signal is considered to be limited? |
| A. | because there can only be a finite number of sidebands |
| B. | because it is equal to the frequency deviation |
| C. | because it is band-limited at the receiver |
| D. | because the power in the outer sidebands is negligible |
| Answer» E. | |
| 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. |
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 | |
| 5. |
Why_the_bandwidth_of_an_FM_signal_is_considered_to_be_limited?$ |
| A. | because there can only be a finite number of sidebands |
| B. | because it is equal to the frequency deviation |
| C. | because it is band-limited at the receiver |
| D. | because the power in the outer sidebands is negligible |
| Answer» E. | |
| 6. |
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 | |
| 7. |
What is the use of pre-emphasis? |
| A. | to increase the signal to noise ratio for higher audio frequencies |
| B. | to allow stereo audio to be carried by FM stations |
| C. | to increase the signal to noise ratio for all audio frequencies |
| D. | to increase the signal to noise ratio for lower audio frequencies |
| Answer» E. | |
| 8. |
Which statement is true about an SCA signal? |
| A. | it can use amplitude modulation |
| B. | it can use frequency modulation |
| C. | is monaural |
| D. | it can use amplitude as well as frequency modulation and is also monaural |
| Answer» E. | |
| 9. |
Mathematically, the number of sidebands in frequency modulated system is _________ |
| A. | infinite |
| B. | one |
| C. | two |
| D. | zero |
| Answer» B. one | |
| 10. |
Which effect is characteristic of FM reception in a noisy environment? |
| A. | threshold effect |
| B. | capture effect |
| C. | bessel effect |
| D. | carson’s effect |
| Answer» B. capture effect | |
| 11. |
Who originated the theory of radio waves? |
| A. | Marconi |
| B. | Bell |
| C. | Hertz |
| D. | Maxwell |
| Answer» E. | |