MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Excess noise ratio is defined as the ratio of generator noise to the noise associated with room temperature |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
The noise power associated with a two port network modeled as thevinin equivalent is: |
| A. | kTB |
| B. | k/TB |
| C. | TB/ K |
| D. | None of the mentioned |
| Answer» B. k/TB | |
| 3. |
The Y factor of an amplifier obtained by measuring the noise figure at the temperatures 77 K and 290 K is 2.7 db. Then the equivalent noise temperature of the amplifier is: |
| A. | 100 K |
| B. | 150 K |
| C. | 170 K |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 4. |
An X- band amplifier has a gain of 20 dB and a gain of 1GHz bandwidth. Noise figure of the amplifier is -62 dBm at 290 K and -64.7 dBm at 77 K. then the Y factor of the amplifier is : |
| A. | 3 dB |
| B. | 6.4 dB |
| C. | 2.7 dB |
| D. | 5.6 dB |
| Answer» D. 5.6 dB | |
| 5. |
4.________ noise is caused by random motion of charges in ionized gas. |
| A. | Plasma noise |
| B. | Quantum noise |
| C. | Thermal noise |
| D. | Flicker noise |
| Answer» B. Quantum noise | |