MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Antennas knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the equivalent radius of the earth when the ray appears to be a straight line over a flat earth surface? |
| A. | 0 |
| B. | Infinity |
| C. | Actual radius |
| D. | 4/3 times actual radius |
| Answer» C. Actual radius | |
| 2. |
The effective radius of earth is how many times the actual radius of earth at standard atmospheric conditions? |
| A. | 3/4 |
| B. | 4/3 |
| C. | 1/4 |
| D. | 1/3 |
| Answer» B. 4/3 | |
| 3. |
Dissipation factor for the dielectric is Df= ____ |
| A. | (1.8 10^6 frac{ }{f(MHz)} ) |
| B. | (1.8 frac{ }{f(MHz)} ) |
| C. | (1.8 10^6 frac{ }{f(GHz)} ) |
| D. | (1.8 10^3 frac{ }{f(MHz)} ) |
| Answer» B. (1.8 frac{ }{f(MHz)} ) | |
| 4. |
The field strength of the surface wave of flat earth is given by ____ |
| A. | E=AE<sub>0</sub>/d |
| B. | E=AE<sub>0</sub>/ |
| C. | E=dE<sub>0</sub>/A |
| D. | E= E<sub>0</sub>/A |
| Answer» B. E=AE<sub>0</sub>/ | |
| 5. |
Spatial attenuation coefficient is given by ____ |
| A. | (4 d/ )<sup>2</sup> |
| B. | (4 /d)<sup>2</sup> |
| C. | 4 /d |
| D. | 4 d/ |
| Answer» B. (4 /d)<sup>2</sup> | |
| 6. |
Power density of the receiving antenna is given by _________ |
| A. | (P_D= frac{P_t G_t}{4 d^2} ) |
| B. | (P_D= frac{P_t G_t}{(4 d/ )^2} ) |
| C. | (P_D= frac{P_t G_t G_r}{(4 d/ )^2} ) |
| D. | (P_D= frac{P_t G_t}{(4 d)^2} ) |
| Answer» B. (P_D= frac{P_t G_t}{(4 d/ )^2} ) | |
| 7. |
What is the condition of roughness of earth for earth to be electrically smooth? |
| A. | R < 0.1 |
| B. | R > 10 |
| C. | R > 0.1 |
| D. | R > 1 |
| Answer» B. R > 10 | |
| 8. |
The field strength of the wave at a unit distance from transmitting antenna depends on _____ |
| A. | only the power radiated by the transmitting antenna |
| B. | only on the power received by the receiving antenna |
| C. | only on directivity of antenna in vertical and horizontal planes |
| D. | both on the power radiated by the transmitting antenna & directivity in vertical and horizontal planes |
| Answer» E. | |
| 9. |
The field strength due to space wave propagation is E=____ |
| A. | ( frac{4 h_t h_r}{ d^2}E_0 ) |
| B. | ( frac{2 h_t h_r}{ d^2}E_0 ) |
| C. | ( frac{4 h_t h_r}{ d}E_0 ) |
| D. | ( frac{4 h_t h_r}{ d^4}E_0 ) |
| Answer» B. ( frac{2 h_t h_r}{ d^2}E_0 ) | |