MCQOPTIONS
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MCQOPTIONS
This section includes 7 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. |
An AM signal is represented by x(t) = (30 + 2Sin(700 t)) Cos(2 t x 102t)V. What is its sideband power? |
| A. | 4W |
| B. | 1W |
| C. | 3W |
| D. | 2W |
| Answer» C. 3W | |
| 2. |
An AM signal is represented by x(t) = (30 + 2Sin(700 t)) Cos(2 t x 102t)V. Find the total power of amplitude modulated wave? |
| A. | 453W |
| B. | 675W |
| C. | 789W |
| D. | 451W |
| Answer» E. | |
| 3. |
An AM signal is represented by x(t) = (30 + 2Sin(700 t)) Cos(2 t x 102t)V. Carrier power of the wave is? |
| A. | 555W |
| B. | 675W |
| C. | 450W |
| D. | 310W |
| Answer» D. 310W | |
| 4. |
An AM signal is represented by x(t) = (30 + 2Sin(700 t)) Cos(2 t x 102t)V. What is the value of modulation index? |
| A. | 0.7 |
| B. | 0.066 |
| C. | 0.341 |
| D. | 0.916 |
| Answer» C. 0.341 | |
| 5. |
The maximum power efficiency of an AM modulator is? |
| A. | 25% |
| B. | 33% |
| C. | 66% |
| D. | 100% |
| Answer» C. 66% | |
| 6. |
Overmodulation results in ________________ |
| A. | Distortion |
| B. | Weakens signal |
| C. | Strengthens the signal |
| D. | provides immunity to noise |
| Answer» B. Weakens signal | |
| 7. |
For 100% modulation, power in each sideband is ________ of that of carrier. |
| A. | 50% |
| B. | 70% |
| C. | 60% |
| D. | 25% |
| Answer» E. | |