MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Antenna Parameters knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The radiation efficiency for antenna having radiation resistance 36.15 and loss resistance 0.85 is given by ________ |
| A. | 0.977 |
| B. | 0.799 |
| C. | 0.997 |
| D. | 0.779 |
| Answer» B. 0.799 | |
| 2. |
10.Radiation resistance of a half-wave dipole is ______ |
| A. | 36.56 |
| B. | 18.28 |
| C. | 73.12 |
| D. | 40.24 |
| Answer» D. 40.24 | |
| 3. |
The axis of back lobe makes an angle of 180 with respect to the beam of an antenna. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Relation between directivity and effective area of transmitting and receiving antenna is ________ |
| A. | D<sub>t</sub> A<sub>t</sub>=D<sub>r</sub> A<sub>r</sub> |
| B. | D<sub>t</sub> A<sub>r</sub>=D<sub>r</sub> A<sub>t</sub> |
| C. | A<sub>t</sub> D<sub>t</sub>= D<sub>r</sub> A<sub>r</sub> |
| D. | D<sub>t</sub> A<sub>t</sub>= D<sub>r</sub> A<sub>r</sub> |
| Answer» C. A<sub>t</sub> D<sub>t</sub>= D<sub>r</sub> A<sub>r</sub> | |
| 5. |
Radiation resistance of a Hertzian dipole of length /8 is ________ |
| A. | 12.33 |
| B. | 8.54 |
| C. | 10.56 |
| D. | 13.22 |
| Answer» B. 8.54 | |
| 6. |
Equivalent circuit representation of an antenna is ______ |
| A. | Series R, L, C |
| B. | Parallel R, L, C |
| C. | Series R, L parallel to C |
| D. | Parallel R, C series to L |
| Answer» B. Parallel R, L, C | |
| 7. |
The equivalent area when multiplied by the instant power density which leads to free radiation of power at antenna is called as _______ |
| A. | Loss area |
| B. | Scattering area |
| C. | Captured area |
| D. | Effective area |
| Answer» C. Captured area | |
| 8. |
What is the overall efficiency of a lossless antenna with reflection coefficient 0.15? |
| A. | 0.997 |
| B. | 0.779 |
| C. | 0.669 |
| D. | 0.977 |
| Answer» E. | |
| 9. |
The ratio of radiation intensity in a given direction from antenna to the radiation intensity over all directions is called as ________ |
| A. | Directivity |
| B. | Radiation power density |
| C. | Gain of antenna |
| D. | Array Factor |
| Answer» B. Radiation power density | |
| 10. |
The induction and radiation fields are equal at a distance of _______ |
| A. | /4 |
| B. | /6 |
| C. | /8 |
| D. | /2 |
| Answer» C. /8 | |
| 11. |
The relation between vector magnetic potential and current density is given by ______ |
| A. | .= |
| B. | = |
| C. | <sup>2</sup> =- |
| D. | <sup>2</sup> = |
| Answer» D. <sup>2</sup> = | |