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Electromagnetics (ECE Perspective) – Multiple Choice Questions (MCQs)

49. For a good conductor
- A. the skin depth ________ as frequency increases.
- B. Increases
- C. Decreases
- D. Remains constant
50. The wave impedance of a lossless dielectric medium is given by:
- A. √(μ/ε)
- B. √(ε/μ)
- C. μ/ε
- D. ε/μ
51. What is the angle of incidence at which the reflected wave is completely polarized
- A. and the reflected and refracted waves are perpendicular?
- B. Critical angle
- C. Brewster angle
- D. Total internal reflection angle
52. A uniform plane wave in a good conductor experiences significant:
- A. Reflection
- B. Refraction
- C. Attenuation
- D. Dispersion
53. The boundary condition for the tangential component of the magnetic field at the interface between two media with no surface current is that it is:
- A. Discontinuous
- B. Continuous
- C. Zero
- D. Infinite
54. The standing wave ratio (SWR) on a transmission line indicates the degree of:
- A. Power loss
- B. Impedance mismatch
- C. Frequency distortion
- D. Phase shift
55. A short-circuited transmission line section of length λ/4 acts as an:
- A. Open circuit
- B. Short circuit
- C. Inductor
- D. Capacitor
56. A quarter-wave transformer is used for:
- A. Impedance matching
- B. Voltage regulation
- C. Frequency conversion
- D. Power amplification
57. The radiation resistance of a small current element is proportional to the square of its:
- A. Length
- B. Current
- C. Frequency
- D. Wavelength
58. The effective aperture of an antenna is a measure of its ability to:
- A. Radiate power
- B. Capture power
- C. Filter signals
- D. Amplify signals
59. The gain of an antenna is related to its directivity and:
- A. Efficiency
- B. Bandwidth
- C. Impedance
- D. Polarization
60. The polarization of an electromagnetic wave refers to the orientation of its:
- A. Electric field vector
- B. Magnetic field vector
- C. Poynting vector
- D. Propagation vector

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Electromagnetics (ECE Perspective) – Multiple Choice Questions (MCQs)

49. For a good conductor

50. The wave impedance of a lossless dielectric medium is given by:

51. What is the angle of incidence at which the reflected wave is completely polarized

52. A uniform plane wave in a good conductor experiences significant:

53. The boundary condition for the tangential component of the magnetic field at the interface between two media with no surface current is that it is:

54. The standing wave ratio (SWR) on a transmission line indicates the degree of:

55. A short-circuited transmission line section of length λ/4 acts as an:

56. A quarter-wave transformer is used for:

57. The radiation resistance of a small current element is proportional to the square of its:

58. The effective aperture of an antenna is a measure of its ability to:

59. The gain of an antenna is related to its directivity and:

60. The polarization of an electromagnetic wave refers to the orientation of its:

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