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 radiation resistance of a monopole is 18 , then the radiation resistance of a Hertzian dipole is _____________ |
| A. | 124 |
| B. | 144 |
| C. | 164 |
| D. | 154 |
| Answer» C. 164 | |
| 2. |
Practically we don t use Hertzian dipole. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The radiation resistance of a monopole is _____ times the current element. |
| A. | 1/8 |
| B. | 1/4 |
| C. | 1/2 |
| D. | 1/16 |
| Answer» B. 1/4 | |
| 4. |
The radiation resistance of a monopole of height 1cm and operating at frequency 100MHz is ____ . |
| A. | 4.83m |
| B. | 4.38k |
| C. | 4.38m |
| D. | 4.83k |
| Answer» D. 4.83k | |
| 5. |
If the radiation resistance of a Hertzian dipole is 100 , then the radiation resistance of short dipole is ____ . |
| A. | 25 |
| B. | 50 |
| C. | 73 |
| D. | 35.6 |
| Answer» B. 50 | |
| 6. |
5.Which of the following is the radiation resistance of the Hertzian dipole? |
| A. | ( frac{ eta_0 w^2 dl^2}{6 pi c^2} ) |
| B. | ( frac{ eta_0 wdl^2}{6 pi c^2} ) |
| C. | ( frac{ eta_0 w^2 dl^2}{3 pi c^2} ) |
| D. | ( frac{ eta_0 w^3 dl^2}{3 pi c^3} ) |
| Answer» B. ( frac{ eta_0 wdl^2}{6 pi c^2} ) | |
| 7. |
When Hertzian dipole is connected to a practical antenna, which of the following fields is observed to be absent when a uniform current flow is observed? |
| A. | Radiation field |
| B. | Induction field |
| C. | Electrostatic field |
| D. | Both radiation and Induction Field |
| Answer» D. Both radiation and Induction Field | |
| 8. |
A Hertzian dipole consists of two _____ and ______ charges separated by a very short distance. |
| A. | unequal, opposite |
| B. | equal, same |
| C. | equal, opposite |
| D. | unequal, same |
| Answer» D. unequal, same | |
| 9. |
Power radiated by a Hertzian dipole of length /30 and carrying a current 2A? |
| A. | 0.87W |
| B. | 3.51W |
| C. | 2.51W |
| D. | 8.77W |
| Answer» C. 2.51W | |
| 10. |
Hertzian dipole carries which type of current throughout its length while radiating? |
| A. | Varying |
| B. | Constant |
| C. | Depends on type of polarization |
| D. | Depends on radiation resistance |
| Answer» C. Depends on type of polarization | |