MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
For a lossy transmission line, γ=0.02+j0.15 and is 20m long. The line is terminated with an impedance of a 400Ω. Then the input impedance of the transmission line given that the characteristic impedance of the transmission line is 156.13+j11.38Ω is: |
| A. | 100+j50 Ω |
| B. | 228+j36.8 Ω |
| C. | 50+36.8j Ω |
| D. | none of the mentioned |
| Answer» C. 50+36.8j Ω | |
| 2. |
For a distortion less line, R= 0.8Ω/m, G= 0.8 msiemens/m, L= 0.01µH/m then C is: |
| A. | 10 pF |
| B. | 1pF |
| C. | 1nF |
| D. | 10nF |
| Answer» B. 1pF | |
| 3. |
If R = 1.5Ω/m, G = 0.2 mseimens/m, L = 2.5 nH/m, C = 0.1 pF/m for a low loss transmission line, then the attenuation constant of the transmission line is: |
| A. | 0.0.158 |
| B. | 0.0523 |
| C. | 0.0216 |
| D. | 0.0745 |
| Answer» B. 0.0523 | |
| 4. |
If the characteristic impedance of a transmission line is 50 Ω, and the inductance of the transmission line being 25 mH/m, the capacitance of the lossy transmission line is: |
| A. | 1µF |
| B. | 10 µF |
| C. | 0.1 µF |
| D. | 50 µF |
| Answer» C. 0.1 µF | |
| 5. |
If the inductance and capacitance of a loss line transmission line are 45 mH/m and10 µF/m, the characteristic impedance of the transmission line is: |
| A. | 50Ω |
| B. | 67.08Ω |
| C. | 100Ω |
| D. | none of the mentioned |
| Answer» C. 100Ω | |
| 6. |
Expression for characteristic impedance Zₒ of a transmission line in terms of L and C the transmission line is: |
| A. | √(C/L) |
| B. | √(CL) |
| C. | √(L/C) |
| D. | 1/√(LC) |
| Answer» D. 1/√(LC) | |
| 7. |
Expression for α(attenuation constant) in terms of R , G, L and C of a transmission line is: |
| A. | (R√(C/L)+G√(L/C))0.5 |
| B. | (R√(C/L)+G√(L/C)) |
| C. | (R√(L/C)+G√(C/L)) |
| D. | (R√(L/C)+G√(C/L))0.5 |
| Answer» B. (R√(C/L)+G√(L/C)) | |
| 8. |
For a low loss line when both conductor and di-electric loss is small, the assumption that could be made is: |
| A. | R < < ωL and G < < ωC |
| B. | R > > ωL and G > >ωC |
| C. | R < <ωC and G < < ωL |
| D. | R > >ωC and G > >ωL |
| Answer» B. R > > ωL and G > >ωC | |