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. |
What is the frequency of the stereo sub carrier signal in FM broadcasting? |
| A. | 19 KHz |
| B. | 45 KHz |
| C. | 55 KHz |
| D. | 38 KHz |
| Answer» E. | |
| 2. |
PUSH_PULL_AMPLIFIER_IS_A_CLASS_B_AMPLIFIER.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
What_is_the_frequency_of_the_stereo_sub_carrier_signal_in_FM_broadcasting?$ |
| A. | 19 KHz |
| B. | 45 KHz |
| C. | 55 KHz |
| D. | 38 KHz |
| Answer» E. | |
| 4. |
What is number of possible outputs if there is 7 line digital input? |
| A. | 64 |
| B. | 32 |
| C. | 16 |
| D. | 128 |
| Answer» E. | |
| 5. |
Which of the following is not necessarily an advantage of FM over AM? |
| A. | less modulating power is required |
| B. | better noise immunity is provided |
| C. | higher bandwidth is required |
| D. | carrier is of any shape |
| Answer» D. carrier is of any shape | |
| 6. |
Which is the true statement about frequency deviation in frequency modulation? |
| A. | frequency deviation is proportional to carrier signal frequency |
| B. | frequency deviation is proportional to amplitude of carrier signal |
| C. | frequency deviation is proportional to modulating frequency |
| D. | frequency deviation is proportional to amplitude of modulating signal |
| Answer» E. | |
| 7. |
The frequency deviation is proportional to frequency in phase modulated signal. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
For a phase modulated signal, the frequency deviation is proportional to ________ |
| A. | frequency only |
| B. | amplitude only |
| C. | only width |
| D. | phase only |
| Answer» C. only width | |
| 9. |
Why frequency fogging is used in a carrier system? |
| A. | to reduce noise |
| B. | to reduce cross talk |
| C. | to converge frequencies |
| D. | to reduce distortion |
| Answer» C. to converge frequencies | |
| 10. |
De-emphasis circuit is used ________ |
| A. | before detection |
| B. | after detection |
| C. | before encoding |
| D. | after encoding |
| Answer» C. before encoding | |
| 11. |
Pre-emphasis is used to amplify _________ frequencies. |
| A. | low |
| B. | high |
| C. | both low and high |
| D. | local oscillator |
| Answer» C. both low and high | |