MCQOPTIONS
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MCQOPTIONS
This section includes 18 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 normalized load impedance of a transmission line is 0.3-j0.4 with a characteristic impedance of 50 Ω, then the load impedance is: |
| A. | 15-j20 |
| B. | 15+j20 |
| C. | 1-j |
| D. | 0.3-0.4j |
| Answer» B. 15+j20 | |
| 2. |
If a transmission line of a characteristic impedance 100 Ω is terminated with a load impedance of 300+j200 Ω, then the normalized load impedance is: |
| A. | 1+j |
| B. | 1-j |
| C. | 3+2j |
| D. | 2-3j |
| Answer» D. 2-3j | |
| 3. |
Normalized impedance of 1-j is: |
| A. | In the upper half of the impedance smith chart |
| B. | In the Lower half of the impedance smith chart |
| C. | On the outer most circle of the smith chart. |
| D. | On the horizontal line of the smith chart |
| Answer» C. On the outer most circle of the smith chart. | |
| 4. |
If the input impedance of a ƛ/2 transmission line is 100 Ω with a voltage reflection coefficient of 0.344, then the characteristic impedance of the transmission line is: |
| A. | 200 Ω |
| B. | 100 Ω |
| C. | 50 Ω |
| D. | None of the mentioned |
| Answer» B. 100 Ω | |
| 5. |
If the normalized input impedance of a transmission line is 0.5 Ω, then he reflection coefficient of a ƛ/2 transmission line is |
| A. | 0.3334 |
| B. | 0.5 |
| C. | 0.6667 |
| D. | 1 |
| Answer» B. 0.5 | |
| 6. |
If the characteristic impedance of a ƛ/2 transmission line is 50 Ω and reflection coefficient 0.3, then its input impedance |
| A. | 26.92 Ω |
| B. | 30 Ω |
| C. | 40 Ω |
| D. | 34.87 Ω |
| Answer» B. 30 Ω | |
| 7. |
Any passively realizable reflection coefficient can be plotted as a unique point on the smith chart. This statement implies that: |
| A. | Reflection co-efficient less than or equal to 1 can be plotted |
| B. | Reflection co-efficient greater than or equal to 1 can be plotted |
| C. | Transmission co-efficient has to be less than or equal to one for the point to be located |
| D. | T=Г+1 |
| Answer» B. Reflection co-efficient greater than or equal to 1 can be plotted | |
| 8. |
IF_THE_NORMALIZED_LOAD_IMPEDANCE_OF_A_TRANSMISSION_LINE_IS_0.3-J0.4_WITH_A_CHARACTERISTIC_IMPEDANCE_OF_50_‚ÂÀ√≠¬¨¬©,_THEN_THE_LOAD_IMPEDANCE_IS:?$# |
| A. | 15-j20 |
| B. | 15+j20 |
| C. | 1-j |
| D. | 0.3-0.4j |
| Answer» B. 15+j20 | |
| 9. |
IF_A_TRANSMISSION_LINE_OF_A_CHARACTERISTIC_IMPEDANCE_100_‚ÂÀ√≠¬¨¬©_IS_TERMINATED_WITH_A_LOAD_IMPEDANCE_OF_300+J200_‚ÂÀ√≠¬¨¬©,_THEN_THE_NORMALIZED_LOAD_IMPEDANCE_IS:?$# |
| A. | 1+j |
| B. | 1-j |
| C. | 3+2j |
| D. | 2-3j |
| Answer» D. 2-3j | |
| 10. |
To get an admittance chart from an impedance chart:$ |
| A. | Smith chart has to be rotated by 90‚Äö√Ö‚àû |
| B. | Smith chart has to be rotated by 180‚Äö√Ö‚àû |
| C. | Admittance chart cannot be obtained from the impedance chart anyway. |
| D. | None of the mentioned |
| Answer» C. Admittance chart cannot be obtained from the impedance chart anyway. | |
| 11. |
Normalized impedance of 1-j is? |
| A. | In the upper half of the impedance smith chart |
| B. | In the Lower half of the impedance smith chart |
| C. | On the outer most circle of the smith chart. |
| D. | On the horizontal line of the smith chart |
| Answer» C. On the outer most circle of the smith chart. | |
| 12. |
Normalized impedance of 0.3+j0.4 lies in the: |
| A. | Upper half of the impedance smith chart |
| B. | Lower half of the impedance smith chart |
| C. | Horizontal line of the chart |
| D. | None of the mentioned |
| Answer» B. Lower half of the impedance smith chart | |
| 13. |
If the input impedance of a ƛ/2 transmission line is 100 Ω with a voltage reflection coefficient of 0.344, then the characteristic impedance of the transmission line is:$ |
| A. | 200 Ω |
| B. | 100 Ω |
| C. | 50 Ω |
| D. | None of the mentioned |
| Answer» B. 100 ‚âà√≠¬¨¬© | |
| 14. |
If the normalized input impedance of a transmission line is 0.5 Ω, then he reflection coefficient of a ƛ/2 transmission line is$ |
| A. | 0.3334 |
| B. | 0.5 |
| C. | 0.6667 |
| D. | 1 |
| Answer» B. 0.5 | |
| 15. |
If the characteristic impedance of a ƛ/2 transmission line is 50 Ω and reflection coefficient 0.3, then its input impedance$ |
| A. | 26.92 Ω |
| B. | 30 Ω |
| C. | 40 Ω |
| D. | 34.87 Ω |
| Answer» B. 30 ‚âà√≠¬¨¬© | |
| 16. |
Reflection coefficient of a transmission line in its polar form can be represented as: |
| A. | ┌=|┌|e<sup>jθ</sup> |
| B. | ┌=|┌|e<sup>jθ-1</sup> |
| C. | ┌=|┌|e<sup>jθ+1</sup> |
| D. | ┌=|┌|e<sup>jθ+α</sup> |
| Answer» B. ‚Äö√Ñ√∂‚àö√Ü‚àö‚Ä¢=|‚Äö√Ñ√∂‚àö√Ü‚àö‚Ä¢|e<sup>j‚âà√≠‚Äö√†√®-1</sup> | |
| 17. |
Any passively realizable reflection coefficient can be plotted as a unique point on the smith chart. This statement implies that: |
| A. | Reflection co-efficient less than or equal to 1 can be plotted |
| B. | Reflection co-efficient greater than or equal to 1 can be plotted |
| C. | Transmission co-efficient has to be less than or equal to one for the point to be located |
| D. | T=–ì+1 |
| Answer» B. Reflection co-efficient greater than or equal to 1 can be plotted | |
| 18. |
Smith chart is based on the polar plot of: |
| A. | Reactance |
| B. | Voltage |
| C. | Current |
| D. | Voltage reflection co-efficient |
| Answer» E. | |