MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
IF_THE_REFLECTION_CO-EFFICIENT_FOR_A_TRANSMISSION_LINE_IS_0.3,_THEN_THE_VSWR_IS:?$ |
| A. | 0.5384 |
| B. | 1.8571 |
| C. | 0.4567 |
| D. | 3.6732 |
| Answer» C. 0.4567 | |
| 2. |
If a transmission line of characteristic impedance 50 Ω is terminated with a load impedance of 150 Ω , then VSWR is:$# |
| A. | 0.75 |
| B. | 0.5 |
| C. | 2 |
| D. | none of the mentioned |
| Answer» B. 0.5 | |
| 3. |
Expression for VSWR in terms of reflection co-efficient is? |
| A. | (1+│┌│)/(1-│┌│) |
| B. | (1-│┌│)/(1+│┌│) |
| C. | 1/│┌│ |
| D. | 1/1+│┌│ |
| Answer» B. (1-‚Äö√Ñ√∂‚àö√Ü‚àö√°‚Äö√Ñ√∂‚àö√Ü‚àö‚Ä¢‚Äö√Ñ√∂‚àö√Ü‚àö√°)/(1+‚Äö√Ñ√∂‚àö√Ü‚àö√°‚Äö√Ñ√∂‚àö√Ü‚àö‚Ä¢‚Äö√Ñ√∂‚àö√Ü‚àö√°) | |
| 4. |
If the reflection coefficient for transmission line is 0.24, then the return lossin dB is: |
| A. | 12.39dB |
| B. | 15dB |
| C. | -12.39dB |
| D. | -15.2dB |
| Answer» B. 15dB | |
| 5. |
Return loss for a transmission line in terms of its reflection co efficient is given by: |
| A. | -20logl‚îål in dB where ‚îå is the reflection coefficient. |
| B. | -10logl‚îål in dB where ‚îå is the reflection coefficient |
| C. | -10log (1/l‚îål) in dB where ‚îå is the reflection coefficient |
| D. | -20log (1/l‚îål) in dB where ‚îå is the reflection coefficient |
| Answer» B. -10logl‚Äö√Ñ√∂‚àö√Ü‚àö‚Ä¢l in dB where ‚Äö√Ñ√∂‚àö√Ü‚àö‚Ä¢ is the reflection coefficient | |
| 6. |
If a transmission line of a characteristics impedance 50 Ω is terminated with a load impedance of 100 Ω, then the reflection co efficient is:$ |
| A. | 0.3334 |
| B. | 0.6667 |
| C. | 1.6 |
| D. | 1.333 |
| Answer» B. 0.6667 | |
| 7. |
Expression for a voltage reflection co-efficient in terms of load impedance and characteristics impedance is: |
| A. | (Z<sub>L</sub>– Z<sub>0</sub>)/(Z<sub>L</sub>+ Z<sub>0</sub>) |
| B. | (Z<sub>L</sub>+ Z<sub>0</sub>)/(Z<sub>L</sub>– Z<sub>0</sub>) |
| C. | Z<sub>L</sub>. Z<sub>0</sub>/( Z<sub>L</sub>+ Z<sub>0</sub>)( Z<sub>L</sub>-Z<sub>0</sub>) |
| D. | (Z<sub>L</sub>+ Z<sub>0</sub>)( Z<sub>L</sub>-Z<sub>0</sub>)/ Z<sub>L</sub>. Z<sub>0</sub> |
| Answer» B. (Z<sub>L</sub>+ Z<sub>0</sub>)/(Z<sub>L</sub>‚Äö√Ñ√∂‚àö√ë‚àö¬® Z<sub>0</sub>) | |
| 8. |
Voltage reflection coefficient can be defined as: |
| A. | ratio of amplitude of reflected voltage wave to the transmitted voltage wave |
| B. | ratio of amplitude of reflected voltage to the incident voltage wave |
| C. | ratio of load impedance to the characteristic impedance of the transmission line |
| D. | none of the mentioned |
| Answer» C. ratio of load impedance to the characteristic impedance of the transmission line | |
| 9. |
We say a transmission line is matched when: |
| A. | Z<sub>L</sub>=Z<sub>0</sub> |
| B. | Z<sub>L</sub>=‚àöZ<sub>0</sub> |
| C. | Z<sub>L</sub>=Z<sub>0</sub>/2 |
| D. | Z<sub>L</sub>=2Z<sub>0</sub> |
| Answer» B. Z<sub>L</sub>=‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇZ<sub>0</sub> | |
| 10. |
When a lossless line is terminated with an arbitrary load impedance ZL, then it : |
| A. | causes wave reflection on transmission lines |
| B. | transmits the entire supplied power |
| C. | causes loss in transmission line |
| D. | none of the mentioned |
| Answer» B. transmits the entire supplied power | |