MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Electromagnetic Theory knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
THE_MODES_IN_A_MATERIAL_HAVING_A_V_NUMBER_OF_20_IS?$ |
| A. | 20 |
| B. | 400 |
| C. | 200 |
| D. | 100 |
| Answer» D. 100 | |
| 2. |
The number of modes is given as 50, find the V number.$ |
| A. | 5 |
| B. | 10 |
| C. | 50 |
| D. | 2500 |
| Answer» C. 50 | |
| 3. |
The phase velocity of a wave with frequency of 15 radian/sec and group phase constant of 2 units i? |
| A. | 30 |
| B. | 15 |
| C. | 7.5 |
| D. | 2/15 |
| Answer» D. 2/15 | |
| 4. |
Find the group wavelength of a wave, given that the group phase constant is 6.28 units. |
| A. | 2 |
| B. | 3.14 |
| C. | 6.28 |
| D. | 1 |
| Answer» E. | |
| 5. |
The group wavelength is greater than the wavelength at any point. State true/false. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
In a waveguide, always which condition holds good? |
| A. | phase velocity = c |
| B. | phase velocity greater than c |
| C. | phase velocity lesser than c |
| D. | group velocity = c |
| Answer» C. phase velocity lesser than c | |
| 7. |
The Bessel function is denoted by |
| A. | J<sub>n</sub>(ha) |
| B. | J<sub>m</sub>(ha) |
| C. | J<sub>n</sub>(hb) |
| D. | J<sub>m</sub>(hb) |
| Answer» B. J<sub>m</sub>(ha) | |
| 8. |
In rectangular waveguides, the dimensions a and b represent the |
| A. | Broad wall dimensions |
| B. | Broad wall and side wall dimension respectively |
| C. | Side wall and broad wall dimension respectively |
| D. | Side wall dimensions |
| Answer» C. Side wall and broad wall dimension respectively | |
| 9. |
The cut off frequency for a waveguide to operate is |
| A. | 3 MHz |
| B. | 3 GHz |
| C. | 6 MHz |
| D. | 6 GHz |
| Answer» E. | |
| 10. |
The waveguide is employed in the transmission lines, when operated at the range of |
| A. | Hz |
| B. | KHz |
| C. | MHz |
| D. | GHz |
| Answer» E. | |