MCQOPTIONS
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MCQOPTIONS
This section includes 7 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. |
The cutoff frequencies of the first two propagating modes of a Teflon on a filled circular waveguide with a=0.5 with ∈r=2.08 is: |
| A. | 12.19 GHz, 15.92 GHz |
| B. | 10 GHz, 12 GHz |
| C. | 12 GHz, 15 GHz |
| D. | 15 GHz, 12 GHz |
| Answer» B. 10 GHz, 12 GHz | |
| 2. |
If β is 0.3 for a circular wave guide operating in TM12 mode with P21=5.315, with the radius of the circular waveguide being equal to 25 mm, then the intrinsic impedance of the wave is: |
| A. | 0.55 Ω |
| B. | 0.4 Ω |
| C. | 0.3 Ω |
| D. | 1.2 Ω |
| Answer» B. 0.4 Ω | |
| 3. |
For TM01 mode of propagation in a circular waveguide with P01=2.405, with the inner diameter of the circular waveguide being equal to 25 mm. What is the cut off frequency for this mode of propagation? |
| A. | 2.8 GHz |
| B. | 6 GHz |
| C. | 3.06 GHz |
| D. | 4 GHz. |
| Answer» D. 4 GHz. | |
| 4. |
In a circular waveguide, if the propagation is in TE21 mode with P21=3.054, with a diameter of 60 mm, then the cutoff frequency for the mode is: |
| A. | 5.6 GHz |
| B. | 6.4 GHz |
| C. | 3.5 GHz |
| D. | 4.8 GHz |
| Answer» E. | |
| 5. |
What is the cutoff frequency for TE₁₁ mode in a circular waveguide of radius 2 cm with P’₁₁= 1.841? |
| A. | 5.5 GHz |
| B. | 4.3 GHz |
| C. | 7.7 GHz |
| D. | 8.1 GHz |
| Answer» C. 7.7 GHz | |
| 6. |
Bessel’s differential equation for a circular waveguide is: |
| A. | ρ2(d2R/ dρ2) + ρ(dR/dρ) + (ρ2kC2– n2) R=0 |
| B. | n2(d2R/ dρ2) + n(dR/dρ) + (ρ2kC2– n2) R=0 |
| C. | d2R/ dρ2 + dR/dρ + (ρ2kC2– n2) R=0 |
| D. | None of the mentioned |
| Answer» B. n2(d2R/ dρ2) + n(dR/dρ) + (ρ2kC2– n2) R=0 | |
| 7. |
In TE mode of a circular waveguide, EZ=0. The wave equation is: |
| A. | ∇2HZ+k2HZ=0 |
| B. | ∇2HZ-k2HZ=0 |
| C. | ∇2HZ-HZ=0 |
| D. | ∇2HZ+HZ=0 |
| Answer» B. ∇2HZ-k2HZ=0 | |