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. |
In normal mode of operation, the radiation is along the end-fire direction. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Which of the following is true about normal mode of radiation? |
| A. | The dimensions of the antenna are small compared to the wavelength |
| B. | The radiation is along the axis of the antenna |
| C. | It has high radiation efficiency |
| D. | It has broad bandwidth |
| Answer» B. The radiation is along the axis of the antenna | |
| 3. |
For a helical antenna radiation, the pitch angleα should be _____ |
| A. | 0 < α < 90 |
| B. | α=0 |
| C. | α=90 |
| D. | α=0 or 90 |
| Answer» B. α=0 | |
| 4. |
In normal mode, the radiation is directed along ______ |
| A. | broadside |
| B. | end-fire |
| C. | along the axis |
| D. | in all directions |
| Answer» B. end-fire | |
| 5. |
Normal mode of radiation is limited in use because _____ |
| A. | it has narrow bandwidth and dependency on small dimensions of the antenna compared to wavelength |
| B. | it has broad bandwidth and independent of antenna dimensions |
| C. | it has narrow bandwidth and is independent of antenna dimensions |
| D. | it has broad bandwidth and dependency on large dimensions of the antenna compared to wavelength |
| Answer» B. it has broad bandwidth and independent of antenna dimensions | |
| 6. |
Which of the following is false regarding normal mode of radiation of helical antenna? |
| A. | The dimensions of the antenna are small compared to the wavelength |
| B. | The far field pattern is independent of the number of turns |
| C. | The current is assumed to vary along the length of the antenna |
| D. | The radiation is normal to the direction of the axis |
| Answer» D. The radiation is normal to the direction of the axis | |
| 7. |
In normal mode of radiation, far field pattern is independent of number of turns in helical antenna. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
In which of the following mode of radiation low efficiency and narrow bandwidth is observed? |
| A. | Normal mode |
| B. | Axial mode |
| C. | Conical mode |
| D. | Beam mode |
| Answer» B. Axial mode | |
| 9. |
Which of the following is the condition for the normal mode of radiation? |
| A. | The dimensions of antenna must be smaller compared to the wavelength |
| B. | The dimensions of antenna must be approximately equal to the wavelength |
| C. | The dimensions of antenna must be greater compared to the wavelength |
| D. | The dimensions of antenna must be approximately equal to or greater than the wavelength |
| Answer» B. The dimensions of antenna must be approximately equal to the wavelength | |
| 10. |
In which of the following the radiation of helical antenna is broadside? |
| A. | Normal mode |
| B. | Axial mode |
| C. | Conical mode |
| D. | Beam mode |
| Answer» B. Axial mode | |