MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
Scanning always takes place from ________ |
| A. | right to left |
| B. | left to right |
| C. | left to right for odd fields and right to left for even fields |
| D. | left to right for even fields and right to left for odd fields |
| Answer» C. left to right for odd fields and right to left for even fields | |
| 2. |
Modem is considered as high speed if data rate is ________ |
| A. | 10000 |
| B. | 20000 |
| C. | 5000 |
| D. | 30000 |
| Answer» D. 30000 | |
| 3. |
Which of the following devices is used to generate AM waves? |
| A. | Square-law modulator |
| B. | Reactance modulator |
| C. | Transmitter |
| D. | Transducer |
| Answer» B. Reactance modulator | |
| 4. |
MODEM_IS_CONSIDERED_AS_HIGH_SPEED_IF_DATA_RATE_IS_________?$ |
| A. | 10000 |
| B. | 20000 |
| C. | 5000 |
| D. | 30000 |
| Answer» D. 30000 | |
| 5. |
Scanning_always_takes_place_from_________$ |
| A. | right to left |
| B. | left to right |
| C. | left to right for odd fields and right to left for even fields |
| D. | left to right for even fields and right to left for odd fields |
| Answer» C. left to right for odd fields and right to left for even fields | |
| 6. |
For 100% amplitude modulation, the power in upper sideband when carrier power is to be 100W? |
| A. | 100W |
| B. | 75W |
| C. | 25W |
| D. | 50W |
| Answer» D. 50W | |
| 7. |
What can we do to eliminate distortion in the picture? |
| A. | use a longer transmission line |
| B. | change the antenna orientation |
| C. | use a short transmission line |
| D. | connect a booster |
| Answer» C. use a short transmission line | |
| 8. |
Carrier wave carries information. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
A wave is modulated by two sin waves having modulation indices of 0.3 and 0.5. Find the total modulation index? |
| A. | 0.1 |
| B. | 0.7 |
| C. | 0.58 |
| D. | 0.35 |
| Answer» D. 0.35 | |
| 10. |
Approximate range of a cordless telephone is ________ |
| A. | 900m |
| B. | 100m |
| C. | 1000m |
| D. | 475m |
| Answer» C. 1000m | |
| 11. |
For low level amplitude modulation, amplifier must be ________ |
| A. | Class C amplifier |
| B. | Class B amplifier |
| C. | Class D amplifier |
| D. | class A amplifier |
| Answer» B. Class B amplifier | |
| 12. |
What is the disadvantage of FM over AM? |
| A. | high modulating power is needed |
| B. | requires high output power |
| C. | large bandwidth required |
| D. | high noise is produced |
| Answer» D. high noise is produced | |