MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
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 | |
| 2. |
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 | |
| 3. |
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 | |
| 4. |
Expression for a transmission co-efficient of a transmission line is : |
| A. | 2Z<sub>L</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. | 2Z<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>) |
| Answer» B. (Z<sub>L</sub>-Z<sub>0</sub>)/ (Z<sub>L</sub>+Z<sub>0</sub>) | |
| 5. |
If a /3 transmission line is open circuited and has characteristic impedance of 50 then the input impedance is: |
| A. | j28.86 |
| B. | 50 |
| C. | j50 |
| D. | 28.86 |
| Answer» B. 50 | |
| 6. |
For a /2 transmission line, if the characteristic impedance of the line is 50 and the terminated with a load of 100 , then its input impedance is: |
| A. | 100 |
| B. | 50 |
| C. | 88.86 |
| D. | none of the mentioned |
| Answer» B. 50 | |
| 7. |
Input impedance of a open circuited transmission line is represented using this trigonometric function: |
| A. | sine function |
| B. | cosine function |
| C. | cotangent function |
| D. | tangent function |
| Answer» D. tangent function | |
| 8. |
Expression for input impedance of an Open circuited transmission line is: |
| A. | -jZ<sub>0</sub>tan l |
| B. | jZ<sub>0</sub>tan l |
| C. | jZ<sub>0</sub>cot l |
| D. | -jZ<sub>0</sub>cot l |
| Answer» E. | |
| 9. |
If a /3 transmission line is short circuited that has a characteristic impedance of 50 , then its input impedance is: |
| A. | -j100 |
| B. | 50 |
| C. | 86.60 |
| D. | j86.60 |
| Answer» E. | |
| 10. |
Input impedance of a transmission line can be represented in terms of this simple trigonometry function. |
| A. | sine function |
| B. | cosine function |
| C. | cotangent function |
| D. | tangent function |
| Answer» E. | |
| 11. |
Input impedance of a short circuited transmission line is : |
| A. | -jZ<sub>0</sub>tan l |
| B. | jZ<sub>0</sub>tan l |
| C. | jZ<sub>0</sub>cot l |
| D. | jZ<sub>0</sub>cot l |
| Answer» C. jZ<sub>0</sub>cot l | |
| 12. |
Expression for input impedance of a transmission line in terms of load impedance and characteristic impedance is: |
| A. | Z<sub>0</sub> (Z<sub>L</sub>+j Z<sub>0</sub>tan l)/ (Z<sub>0</sub>+j Z<sub>L</sub>tan l) |
| B. | (Z<sub>0</sub>+j Z<sub>L</sub>tan l)/ (Z<sub>L</sub>+j Z<sub>0</sub>tan l) |
| C. | Z<sub>0</sub> (Z<sub>L</sub>-j Z<sub>0</sub>tan l)/ (Z<sub>0</sub>-j Z<sub>L</sub>tan l) |
| D. | (Z<sub>0</sub>-j Z<sub>L</sub>tan l)/ (Z<sub>L</sub>-j Z<sub>0</sub>tan l) |
| Answer» B. (Z<sub>0</sub>+j Z<sub>L</sub>tan l)/ (Z<sub>L</sub>+j Z<sub>0</sub>tan l) | |