MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
Aliasing refers to ________ |
| A. | Sampling of signals less than at Nyquist rate |
| B. | Sampling of signals at Nyquist rate |
| C. | Sampling of signals greater than at Nyquist rate |
| D. | Unsampled the original signal |
| Answer» B. Sampling of signals at Nyquist rate | |
| 2. |
FIND_THE_TOTAL_POWER,_IF_THE_CARRIER_OF_AN_AM_TRANSMITTER_IS_800W_AND_IT_IS_MODULATED_TO_50%??$ |
| A. | 100W |
| B. | 800W |
| C. | 500W |
| D. | 900W |
| Answer» E. | |
| 3. |
Aliasing_refers_to_________$ |
| A. | Sampling of signals less than at Nyquist rate |
| B. | Sampling of signals at Nyquist rate |
| C. | Sampling of signals greater than at Nyquist rate |
| D. | Unsampled the original signal |
| Answer» B. Sampling of signals at Nyquist rate | |
| 4. |
What is the carrier power of an un-modulated carrier signal when it is transmitted through an antenna having an impedance of 50·øº and it produces a current of 5.4A?$ |
| A. | 1458W |
| B. | 1468W |
| C. | 1478W |
| D. | 1488W |
| Answer» B. 1468W | |
| 5. |
The antenna current is 10A. Find the percentage of modulation when the antenna current increases to 10.4A? |
| A. | 50% |
| B. | 30% |
| C. | 28.5% |
| D. | 23% |
| Answer» D. 23% | |
| 6. |
What is the function of RF mixer? |
| A. | Addition of two signals |
| B. | Multiplication of two signals |
| C. | Subtraction of two signals |
| D. | To reduce the amount of noise |
| Answer» C. Subtraction of two signals | |
| 7. |
One of the advantage of using a high frequency carrier wave is that it dissipates very small power. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
What is the bandwidth required in SSB signal? |
| A. | f<sub>m</sub> |
| B. | 2f<sub>m</sub> |
| C. | > 2f<sub>m</sub> |
| D. | < 2f<sub>m</sub> |
| Answer» B. 2f<sub>m</sub> | |