MCQOPTIONS
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MCQOPTIONS
This section includes 5 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. |
Signal and its Hilbert transform have ________ |
| A. | same energy density spectrum |
| B. | same power |
| C. | a phase difference of 60 |
| D. | a phase difference of 120 |
| Answer» B. same power | |
| 2. |
For signal, m(t) = 50cos(10 90t + 30 sin100t), the power dissipated by the 20 resistor is ________ |
| A. | 100W |
| B. | 65W |
| C. | 74.7W |
| D. | 62.5W |
| Answer» E. | |
| 3. |
Carson s rule is used to calculate ________ |
| A. | Bandwidth of FM signal |
| B. | SNR |
| C. | Modulation index of FM signal |
| D. | Figure of merit |
| Answer» B. SNR | |
| 4. |
Consider an AM broadcast station that transmits modulating frequencies up to 10kHz. If it transmits a frequency of 1000 kHz. Find its maximum and minimum upper and lower sidebands frequencies and also the total bandwidth? |
| A. | 900 KHz, 820 KHz, 1000 Hz |
| B. | 720 KHz, 650 KHz, 1020 Hz |
| C. | 1010 KHz, 880 KHz, 15000 Hz |
| D. | 1010 KHz, 990 KHz, 20000 Hz |
| Answer» E. | |
| 5. |
Calculate the Nyquist rate for the signal x(t) = 12cos50 t + 7 cos75 t 13 cos100 t. |
| A. | 300 Hz |
| B. | 600 Hz |
| C. | 100 Hz |
| D. | 150 Hz |
| Answer» D. 150 Hz | |