MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The relation between nepers and decibels is: |
| A. | 1 Np= 8.686 dB |
| B. | 1 dB=8.868 dB |
| C. | Np≥dB |
| D. | dB≥Np |
| Answer» B. 1 dB=8.868 dB | |
| 2. |
For a transmission line, if the transmission coefficient is 1.4, then the insertion loss in dB is: |
| A. | -2.922dB |
| B. | 29dB |
| C. | 1.46dB |
| D. | -29dB |
| Answer» B. 29dB | |
| 3. |
If the transmission coefficient of a transmission line is 1.6, then the reflection co efficient is: |
| A. | 0.8 |
| B. | 0.6 |
| C. | 0.4 |
| D. | 0.3 |
| Answer» C. 0.4 | |
| 4. |
For a transmission line, if the reflection coefficient is 0.4, then the transmission coefficient is: |
| A. | 0.4 |
| B. | 1.4 |
| C. | 0.8 |
| D. | 2.8 |
| Answer» C. 0.8 | |
| 5. |
Expression for a transmission co-efficient of a transmission line is : |
| A. | 2ZL/ ( ZL+Z0) |
| B. | (ZL-Z0)/ (ZL+Z0) |
| C. | 2Z0/( ZL+Z0) |
| D. | (ZL+Z0)/ (ZL-Z0) |
| Answer» B. (ZL-Z0)/ (ZL+Z0) | |
| 6. |
If a λ/3 transmission line is open circuited and has characteristic impedance of 50 Ω then the input impedance is: |
| A. | j28.86Ω |
| B. | 50Ω |
| C. | j50Ω |
| D. | 28.86Ω |
| Answer» B. 50Ω | |
| 7. |
For a λ/2 transmission line, if the characteristic impedance of the line is 50 Ω and the terminated with a load of 100 Ω, then its input impedance is: |
| A. | 100Ω |
| B. | 50Ω |
| C. | 88.86Ω |
| D. | none of the mentioned |
| Answer» B. 50Ω | |
| 8. |
Expression for input impedance of an Open circuited transmission line is: |
| A. | -jZ0tanβl |
| B. | jZ0tanβl |
| C. | jZ0cotβl |
| D. | -jZ0cotβl |
| Answer» E. | |
| 9. |
If a ƛ/3 transmission line is short circuited that has a characteristic impedance of 50 Ω, then its input impedance is: |
| A. | -j100Ω |
| B. | 50Ω |
| C. | 86.60Ω |
| D. | –j86.60Ω |
| Answer» E. | |