MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
If the transmission co-efficient T₁ of a transmission line is 1.333 and the characteristic impedance of the λ/4 transmission line used is 100Ω, then the characteristic impedance of the transmission line is: |
| A. | 50Ω |
| B. | 100Ω |
| C. | 70.71Ω |
| D. | None of the mentioned |
| Answer» B. 100Ω | |
| 2. |
If a transmission line of zₒ=50Ω is matched using λ/4 transmission line of z₁=100Ω, then the transmission co efficient T₂ is: |
| A. | 1 |
| B. | 0.6667 |
| C. | 1.3333 |
| D. | 2 |
| Answer» C. 1.3333 | |
| 3. |
When a transmission line of characteristic impedance(50Ω) zₒ is matched to a load by a λ/4 transmission line of characteristic impedance 100Ω, then the transmission co efficient is: |
| A. | 1.5 |
| B. | 0.5 |
| C. | 1.333 |
| D. | 2 |
| Answer» D. 2 | |
| 4. |
If the reflection co-efficient of a transmission line is 0.334 with a characteristic impedance of 50Ω then the input impedance of the transmission line is: |
| A. | 100 Ω |
| B. | 50 Ω |
| C. | 150 Ω |
| D. | None of the mentioned |
| Answer» B. 50 Ω | |
| 5. |
For a transmission line , if the input impedance of the transmission line is 100Ω with a characteristic impedance of 150Ω, then the magnitude of the reflection co efficient: |
| A. | 0.5 |
| B. | 1 |
| C. | 0.2 |
| D. | 0 |
| Answer» D. 0 | |
| 6. |
When a λ/4 transmission line is used for impedance matching, then which of the following is valid? |
| A. | Standing waves are present on the λ/4 transmission line |
| B. | No standing waves on the λ/4 transmission line |
| C. | Standing waves are not present both on the feed line and the matching λ/4 line |
| D. | Standing waves are present on both the feed line and the matching λ/4 line |
| Answer» B. No standing waves on the λ/4 transmission line | |
| 7. |
If there is no standing wave on a transmission line, then the value of SWR is: |
| A. | 1 |
| B. | 0 |
| C. | Infinity |
| D. | Insufficient data |
| Answer» B. 0 | |
| 8. |
Expression for the characteristic impedance of a transmission line(λ/4) used for impedance matching is: |
| A. | Z1=√(ZₒR)L |
| B. | Z1=√(Zₒ/R)L |
| C. | Z1=√(Zₒ+R)L |
| D. | None of the mentioned |
| Answer» B. Z1=√(Zₒ/R)L | |
| 9. |
If a λ/4 transmission line is 100Ω is used to match a transmission line to a load of 100Ω, then the characteristic impedance of the transmission line is: |
| A. | 100 Ω |
| B. | 50 Ω |
| C. | 70.71 Ω |
| D. | 200 Ω |
| Answer» B. 50 Ω | |
| 10. |
If a transmission line of characteristic impedance 50 Ω is to be matched to a load of 100Ω, then the characteristic impedance of the ƛ/4 transmission line to be used is: |
| A. | 70.71 Ω |
| B. | 50 Ω |
| C. | 100 Ω |
| D. | 75 Ω |
| Answer» B. 50 Ω | |