MCQOPTIONS
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MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the field strength at receiving antenna is 1 µV/m, and the effective aperture area is 0.4 m2 and the intrinsic impedance of the medium is 377 Ω, then the power received by the antenna is: |
| A. | 1.06 pW |
| B. | 1.06 fW |
| C. | 2 µW |
| D. | None of the mentioned |
| Answer» C. 2 µW | |
| 2. |
Considering distance as a parameter, two types of field zones can be defined around an antenna. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
A source with a unidirectional cosine squared radiation intensity pattern is given by UMcos2 (θ). The directivity of the given source is: |
| A. | 6 |
| B. | 8 |
| C. | 2 |
| D. | 7 |
| Answer» B. 8 | |
| 4. |
A source has a radiation intensity pattern given by U=UM sin θ. The directivity of the source with this power pattern is: |
| A. | 1 |
| B. | 1.27 |
| C. | 2.4 |
| D. | 3.4 |
| Answer» C. 2.4 | |
| 5. |
A source has a cosine radiation-intensity pattern given by U=UM cos (θ). The directivity of this source is: |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 6. |
The expression for pointing vector of an isotropic point source at a distance ‘r’ from the source is given by: |
| A. | P/ 4πR2 |
| B. | P/4π |
| C. | P/ 4πR |
| D. | P×4πR2 |
| Answer» B. P/4π | |
| 7. |
CONSIDERING_DISTANCE_AS_A_PARAMETER,_TWO_TYPES_OF_FIELD_ZONES_CAN_BE_DEFINED_AROUND_AN_ANTENNA.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
If_the_field_strength_at_receiving_antenna_is_1_µV/m,_and_the_effective_aperture_area_is_0.4_m2_and_the_intrinsic_impedance_of_the_medium_is_377_Ω,_then_the_power_received_by_the_antenna_is:$# |
| A. | 1.06 pW |
| B. | 1.06 fW |
| C. | 2 µW |
| D. | None of the mentioned |
| Answer» C. 2 ¬¨¬®¬¨¬µW | |
| 9. |
A source with a unidirectional cosine squared radiation intensity pattern is given by UMcos2 (θ). The directivity of the given source is?# |
| A. | 6 |
| B. | 8 |
| C. | 2 |
| D. | 7 |
| Answer» B. 8 | |
| 10. |
A source has a sine squared radiation intensity power pattern. The directivity of the given source is: |
| A. | 1.5 |
| B. | 3 |
| C. | 2.5 |
| D. | 3.5 |
| Answer» B. 3 | |
| 11. |
A source has a radiation intensity pattern given by U=UM sin θ. The directivity of the source with this power pattern is:$ |
| A. | 1 |
| B. | 1.27 |
| C. | 2.4 |
| D. | 3.4 |
| Answer» C. 2.4 | |
| 12. |
A source has a cosine power pattern that is bidirectional. Given that the directivity of a unidirectional source with cosine power pattern has a directivity of 4, then the directivity of the unidirectional source is: |
| A. | 1 |
| B. | 2 |
| C. | 4 |
| D. | 8 |
| Answer» C. 4 | |
| 13. |
A source has a cosine radiation-intensity pattern given by U=UM cos (θ). The directivity of this source is:$ |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 14. |
The expression for pointing vector of an isotropic point source at a distance ‘r’ from the source is given by:$ |
| A. | P/ 4πR<sup>2</sup> |
| B. | P/4π |
| C. | P/ 4πR |
| D. | P×4πR<sup>2</sup> |
| Answer» B. P/4‚âà√¨‚àö√ë | |
| 15. |
Antennas that radiate energy only in a specified are called anisotropic antennas. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 16. |
An antenna source that radiates energy uniformly in all the directions is called: |
| A. | Isotropic source |
| B. | Anisotropic source |
| C. | Point source |
| D. | None of the mentioned |
| Answer» B. Anisotropic source | |