MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 12 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. |
EM_WAVES_DO_NOT_TRAVEL_INSIDE_METALS._STATE_TRUE/FALSE.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
An example for electromagnetic wave propagation is$ |
| A. | refrigerator |
| B. | electric fan |
| C. | mobile transponder |
| D. | relays in actuators |
| Answer» D. relays in actuators | |
| 3. |
The propagation constant of the wave in a conductor with air as medium is$ |
| A. | √(ωμσ) |
| B. | ωμσ |
| C. | √(ω/μσ) |
| D. | ω/μσ |
| Answer» B. ‚âà√¨‚àö¬¢‚âà√≠¬¨‚à´‚âà√¨‚àö√¢ | |
| 4. |
The phase shift in the electric and magnetic fields in an EM wave is given by which parameter? |
| A. | phase constant |
| B. | attenuation constant |
| C. | propagation constant |
| D. | intrinsic impedance |
| Answer» E. | |
| 5. |
In conductors, the E and H vary by a phase difference o? |
| A. | 0 |
| B. | 30 |
| C. | 45 |
| D. | 60 |
| Answer» D. 60 | |
| 6. |
The expression for velocity of a wave in the conductor is |
| A. | V = √(2ω/μσ) |
| B. | V = √(2ωμσ) |
| C. | V = (2ω/μσ) |
| D. | V = (2ωμσ) |
| Answer» B. V = ‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ(2‚âà√¨‚àö¬¢‚âà√≠¬¨‚à´‚âà√¨‚àö√¢) | |
| 7. |
The skin depth of a conductor with attenuation constant of 7 neper/m is |
| A. | 14 |
| B. | 49 |
| C. | 7 |
| D. | 1/7 |
| Answer» E. | |
| 8. |
Calculate the attenuation constant of a conductor of conductivity 200 units, frequency 1M radian/s in air. |
| A. | 11.2 |
| B. | 1.12 |
| C. | 56.23 |
| D. | 5.62 |
| Answer» B. 1.12 | |
| 9. |
Calculate the phase constant of a conductor with attenuation constant given by 0.04 units. |
| A. | 0.02 |
| B. | 0.08 |
| C. | 0.0016 |
| D. | 0.04 |
| Answer» E. | |
| 10. |
The total permeability in a conductor is |
| A. | Absolute permeability |
| B. | Relative permeability |
| C. | Product of absolute and relative permeability |
| D. | Unity |
| Answer» D. Unity | |
| 11. |
In metals, the total permittivity is |
| A. | Absolute permittivity |
| B. | Relative permittivity |
| C. | Product of absolute and relative permittivity |
| D. | Unity |
| Answer» B. Relative permittivity | |
| 12. |
For conductors, the loss tangent will be |
| A. | Zero |
| B. | Unity |
| C. | Maximum |
| D. | Minimum |
| Answer» D. Minimum | |