MCQOPTIONS
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MCQOPTIONS
This section includes 9 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 first propagating mode on a grounded dielectric is: |
| A. | TMO mode |
| B. | TM1 mode |
| C. | TM2 mode |
| D. | TM3 mode |
| Answer» C. TM2 mode | |
| 2. |
What is the cutoff frequency of TE₁ mode of propagation if the relative permittivity of the slab is 3.2 and the thickness of the slab is 45 mm? |
| A. | 2.24 GHz |
| B. | 4 GHz |
| C. | 1.12 GHz |
| D. | 8 GHz |
| Answer» D. 8 GHz | |
| 3. |
Cutoff frequency fC for TEM mode of propagation is: |
| A. | Fc= (2n-1)c/4d√εr -1 |
| B. | Fc= (2n-c)/2d(√εr-1) |
| C. | Fc= (2n-1)/4d(√εr) |
| D. | Fc= (2n-1)/8d√εr – 1 |
| Answer» B. Fc= (2n-c)/2d(√εr-1) | |
| 4. |
In TE of propagation, HZ must obey the below equation for wave propagation in the region of presence of dielectric: |
| A. | (∂2/∂x2 + kc2) hZ(x,y)=0 |
| B. | (∂2/∂x2– h2)hZ(x,y)=0 |
| C. | (∂2/∂x2 – Kc2)hZ(x,y)=0 |
| D. | (∂2/∂x2 +h2)hZ(x,y)=0 |
| Answer» B. (∂2/∂x2– h2)hZ(x,y)=0 | |
| 5. |
The cutoff frequency in TM1 mode for the propagation of EM waves on dielectric slab of relative permittivity 2.6 and thickness 20 mm is: |
| A. | 6.5 GHz |
| B. | 5.92 GHz |
| C. | 4 GHz |
| D. | 2 GHz |
| Answer» C. 4 GHz | |
| 6. |
For surface waves on a dielectric sheet the cutoff frequency of the TM mode can be given as: |
| A. | fC = nC/2d√(ϵr-1) |
| B. | fC = C/2nd√(ϵr-1) |
| C. | fC = C/2nd√ϵr |
| D. | fC = 2C/nd√ϵr |
| Answer» B. fC = C/2nd√(ϵr-1) | |
| 7. |
For wave propagation on grounded dielectric sheet, the equation to be satisfied by Ez , in the region of presence of dielectric 0≤x≤d for the propagation to be in Z direction |
| A. | (∂2/∂x2 + ∈rk02– β2) eZ(x,y)=0 |
| B. | (∂2/∂x2 + k02– β2) eZ(x,y)=0 |
| C. | (∂2/∂x2 – k02+β2) eZ(x,y)=0 |
| D. | (∂2/∂x2 + ∈rk02) eZ(x,y)=0 |
| Answer» B. (∂2/∂x2 + k02– β2) eZ(x,y)=0 | |
| 8. |
Because of the presence of the dielectric, the phase velocity of a surface wave is: |
| A. | Greater than that in vacuum |
| B. | Lesser than that in vacuum |
| C. | Independent of the presence of dielectric |
| D. | Insufficient data |
| Answer» C. Independent of the presence of dielectric | |
| 9. |
Surface waves are typical by a field that decays ______away from the dielectric surface, with most of the field contained in or near the dielectric. |
| A. | Linearly |
| B. | Exponentially |
| C. | Cubical |
| D. | Field remains a constant |
| Answer» C. Cubical | |