MCQOPTIONS
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MCQOPTIONS
This section includes 14 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 minimum impedance of a transmission line 75 ohm with a standing wave ratio of 4 is |
| A. | 75 |
| B. | 300 |
| C. | 18.75 |
| D. | 150 |
| Answer» D. 150 | |
| 2. |
The maximum impedance of a transmission line 50 ohm and the standing wave ratio of 2.5 is |
| A. | 20 |
| B. | 125 |
| C. | 200 |
| D. | 75 |
| Answer» C. 200 | |
| 3. |
THE_MINIMUM_IMPEDANCE_OF_A_TRANSMISSION_LINE_75_OHM_WITH_A_STANDING_WAVE_RATIO_OF_4_IS?$ |
| A. | 75 |
| B. | 300 |
| C. | 18.75 |
| D. | 150 |
| Answer» D. 150 | |
| 4. |
The characteristic impedance of a transmission line is normally chosen to be$ |
| A. | 50 |
| B. | 75 |
| C. | 50 or 75 |
| D. | 100 |
| Answer» D. 100 | |
| 5. |
The average power in an electromagnetic wave is given by$ |
| A. | propagation constant |
| B. | poynting vector |
| C. | phase constant |
| D. | attenuation constant |
| Answer» C. phase constant | |
| 6. |
Identify the material which is not present in a transmission line setup. |
| A. | waveguides |
| B. | cavity resonator |
| C. | antenna |
| D. | oscillator |
| Answer» E. | |
| 7. |
The maximum impedance of a transmission line 50 ohm and the standing wave ratio of 2.5 i? |
| A. | 20 |
| B. | 125 |
| C. | 200 |
| D. | 75 |
| Answer» C. 200 | |
| 8. |
The group delay of the wave with phase constant of 62.5 units and frequency of 4.5 radian/sec is |
| A. | 13.88 |
| B. | 31.88 |
| C. | 88.13 |
| D. | 88.31 |
| Answer» B. 31.88 | |
| 9. |
The power of the transmitter with a radiation resistance of 12 ohm and an antenna current of 3.5A is |
| A. | 147 |
| B. | 741 |
| C. | 174 |
| D. | 471 |
| Answer» B. 741 | |
| 10. |
When the ratio of load voltage to input voltage is 5, the ratio of the characteristic impedance to the input impedance is |
| A. | 1/5 |
| B. | 5 |
| C. | 10 |
| D. | 25 |
| Answer» C. 10 | |
| 11. |
The reflection coefficient lies in the range of |
| A. | 0 < τ < 1 |
| B. | -1 < τ < 1 |
| C. | 1 < τ < ∞ |
| D. | 0 < τ < ∞ |
| Answer» B. -1 < ‚âà√¨‚àö√´ < 1 | |
| 12. |
For a matched line, the input impedance will be equal to |
| A. | Load impedance |
| B. | Characteristic impedance |
| C. | Output impedance |
| D. | Zero |
| Answer» C. Output impedance | |
| 13. |
The input impedance of a quarter wave line 50 ohm and load impedance of 20 ohm is |
| A. | 50 |
| B. | 20 |
| C. | 1000 |
| D. | 125 |
| Answer» E. | |
| 14. |
The characteristic impedance of a quarter wave transformer with load and input impedances given by 30 and 75 respectively is |
| A. | 47.43 |
| B. | 37.34 |
| C. | 73.23 |
| D. | 67.45 |
| Answer» B. 37.34 | |