MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Antennas knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Brewster angle doesn t exist for perpendicular polarization. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Find the tilt angle of the radio wave with 1MHz frequency and conductivity of earth is 5 10-3S/m and relative permittivity 10? |
| A. | 41.8 |
| B. | 83.6 |
| C. | 48.1 |
| D. | 38.6 |
| Answer» B. 83.6 | |
| 3. |
Which of the following is the expression for tilt angle? |
| A. | ( =1/2 tan^{-1} u2061( frac{ }{ }) ) |
| B. | ( =2 tan^{-1} u2061( frac{ }{ }) ) |
| C. | ( =1/2 tan^{-1} u2061( frac{ }{ }) ) |
| D. | ( =2 tan^{-1} u2061( frac{w }{ }) ) |
| Answer» B. ( =2 tan^{-1} u2061( frac{ }{ }) ) | |
| 4. |
Complex dielectric constant of earth is given by ____ |
| A. | ( = + frac{ }{jw} ) |
| B. | ( = + frac{1}{jw} ) |
| C. | ( = + frac{ }{jw} ) |
| D. | ( = + frac{ }{jw} ) |
| Answer» B. ( = + frac{1}{jw} ) | |
| 5. |
Transmission coefficient of a plane wave with normal incidence is _________ |
| A. | ( _t= frac{2 _2}{ _2+ _1} ) |
| B. | ( _t= frac{ _2}{ _2+ _1} ) |
| C. | ( _t= frac{2 _2}{ _2+ _1} ) |
| D. | ( _r= frac{ _2- _1}{ _2+ _1} ) |
| Answer» B. ( _t= frac{ _2}{ _2+ _1} ) | |
| 6. |
Relation between transmission coefficient t and reflection coefficient is r is |
| A. | <sub>r</sub>= <sub>t</sub>-1 |
| B. | <sub>r</sub>= <sub>t</sub>+1 |
| C. | <sub>r</sub>= <sub>t</sub>-2 |
| D. | <sub>r</sub>= ( <sub>t</sub>-1) / <sub>t</sub>+1 |
| Answer» B. <sub>r</sub>= <sub>t</sub>+1 | |
| 7. |
Reflection coefficient of plane waves with normal incidence in terms of impedances of medium is ____ |
| A. | ( _r= frac{ _2- _1}{ _2+ _1} ) |
| B. | ( _r= frac{2 _2}{ _2+ _1} ) |
| C. | ( _r= frac{2 _1}{ _2+ _1} ) |
| D. | ( _r= frac{ _2+ _1}{ _2- _1} ) |
| Answer» B. ( _r= frac{2 _2}{ _2+ _1} ) | |
| 8. |
Which of the following holds true for Brewster angle? |
| A. | It is about the angle of reflection |
| B. | It is the angle of incident at which no reflections occur |
| C. | It is the angle of incident at which maximum reflections occur |
| D. | It is about the angle of refraction |
| Answer» C. It is the angle of incident at which maximum reflections occur | |
| 9. |
What is the reflection coefficient if there are no any reflections? |
| A. | 1 |
| B. | 0 |
| C. | <1 |
| D. | >1 |
| Answer» C. <1 | |
| 10. |
What is the reflection coefficient for a perfect reflecting surface? |
| A. | 1 |
| B. | 0 |
| C. | <1 |
| D. | >1 |
| Answer» B. 0 | |
| 11. |
The reflection factor is given by the ratio of ____________ |
| A. | Reflected wave to incident wave |
| B. | Incident wave to reflected wave |
| C. | Sum of reflected and incident waves to difference of reflected and incident waves |
| D. | Difference of reflected and incident waves to sum of reflected and incident waves |
| Answer» B. Incident wave to reflected wave | |