MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Antennas knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the spacing between turns of the helical antenna is zero then it acts as a ________ |
| A. | Loop antenna |
| B. | Linear dipole |
| C. | Parabolic antenna |
| D. | Log periodic antenna |
| Answer» B. Linear dipole | |
| 2. |
The radiation pattern of the helical antenna is a combination of small dipole and loop antenna. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
In which of the following modes, the dimension of the helical antenna circumference is greater than the wavelength? |
| A. | Normal mode |
| B. | Axial mode |
| C. | Conical mode |
| D. | Beam mode |
| Answer» D. Beam mode | |
| 4. |
In which of the following mode, there are no minor lobes at oblique angles in radiation pattern? |
| A. | Normal mode |
| B. | Axial mode |
| C. | Conical mode |
| D. | Beam mode |
| Answer» B. Axial mode | |
| 5. |
In which of the following mode, the helical antenna has narrow bandwidth? |
| A. | Normal mode |
| B. | Axial mode |
| C. | Beam mode |
| D. | End-fire mode |
| Answer» B. Axial mode | |
| 6. |
Which of the following is true regarding the axial mode of radiation in helical antenna? |
| A. | Radiation is broad, directional along axis and produces minor lobes |
| B. | Radiation pattern is narrow and no minor lobes are produced |
| C. | Minor lobes are produced only along the direction of helical axis |
| D. | The dimensions of antenna are smaller than the wavelength |
| Answer» B. Radiation pattern is narrow and no minor lobes are produced | |
| 7. |
Drawbacks of the normal mode of radiation in helical antenna are _______ |
| A. | low radiation efficiency and narrow bandwidth |
| B. | high radiation efficiency and narrow bandwidth |
| C. | low radiation efficiency and Broad bandwidth |
| D. | high radiation efficiency and broad bandwidth |
| Answer» B. high radiation efficiency and narrow bandwidth | |
| 8. |
In which of the following mode the dimensions of the antenna must be smaller compared to the wavelength? |
| A. | Normal mode |
| B. | Axial mode |
| C. | Beam mode |
| D. | End-fire mode |
| Answer» B. Axial mode | |
| 9. |
In which of the following mode, the radiation is perpendicular to the axis of helical antenna? |
| A. | Normal mode |
| B. | Axial mode |
| C. | Beam mode |
| D. | End-fire mode |
| Answer» B. Axial mode | |
| 10. |
Which of the following modes of radiation, the radiation of helical antenna is along the end-fire direction? |
| A. | Axial mode |
| B. | Normal mode |
| C. | Perpendicular mode |
| D. | Beam mode and Normal mode |
| Answer» B. Normal mode | |