MCQOPTIONS
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MCQOPTIONS
This section includes 13 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. |
The signals sent by the TV transmitters to ensure correct scanning in the receiver are called luminance. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Why interlacing is used in television? |
| A. | to reduce noise in video signals |
| B. | to ensure that all the lines on screen are scanned |
| C. | to reduce the disturbances |
| D. | to avoid flicker |
| Answer» E. | |
| 3. |
The number of frames per second in the United States TV system is _________ |
| A. | 262.5 |
| B. | 525 |
| C. | 45 |
| D. | 30 |
| Answer» E. | |
| 4. |
Which of the following is the most generally used term for comparing amplifier noise characteristics? |
| A. | signal to noise ratio |
| B. | equivalent noise |
| C. | noise factor |
| D. | figure of merit |
| Answer» D. figure of merit | |
| 5. |
Which one of the following is not a useful quantity for comparing the noise performance of receivers? |
| A. | Input noise voltage |
| B. | Signal To Noise Ration |
| C. | Noise Figure |
| D. | Figure of merit |
| Answer» B. Signal To Noise Ration | |
| 6. |
WHY_INTERLACING_IS_USED_IN_TELEVISION??$ |
| A. | to reduce noise in video signals |
| B. | to ensure that all the lines on screen are scanned |
| C. | to reduce the disturbances |
| D. | to avoid flicker |
| Answer» E. | |
| 7. |
The_signals_sent_by_the_TV_transmitters_to_ensure_correct_scanning_in_the_receiver_are_called_luminance.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
If 32 equally probable events exists and we have to select one of them, number of required bits is? |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 5 |
| Answer» E. | |
| 9. |
The number of frames per second in the United States TV system is ________? |
| A. | 262.5 |
| B. | 525 |
| C. | 45 |
| D. | 30 |
| Answer» E. | |
| 10. |
The number of lines per field in the United States TV system is _________ |
| A. | 262.5 |
| B. | 525 |
| C. | 300 |
| D. | 600 |
| Answer» B. 525 | |
| 11. |
If the value of a resistor creating thermal noise is doubled. The noise power generator is therefore ________ |
| A. | unchanged |
| B. | doubled |
| C. | quadrupled |
| D. | halved |
| Answer» B. doubled | |
| 12. |
Which one of the following is not an omnidirectional antenna? |
| A. | Marconi |
| B. | Discone |
| C. | Log-periodic |
| D. | Half-wave dipole |
| Answer» D. Half-wave dipole | |
| 13. |
The discone antenna is ________ |
| A. | useful direction-finding antenna |
| B. | used as a radar receiving antenna |
| C. | circularly polarized |
| D. | useful as VHF and UHF receiving antenna |
| Answer» E. | |