AllInfoHub – MCQ Practice

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

73. The input impedance of a lossless transmission line terminated with a short circuit repeats every ________ wavelength.
- A. Half
- B. Quarter
- C. Full
- D. Two
74. The boundary condition for the normal component of the magnetic flux density at the interface between two media is that it is:
- A. Discontinuous
- B. Continuous
- C. Zero
- D. Infinite
75. The magnetic vector potential A is related to the magnetic flux density B by:
- A. B = ∇ × A
- B. B = ∇ ⋅ A
- C. A = ∇ × B
- D. A = ∇ ⋅ B
76. The unit of magnetic flux is:
- A. Tesla
- B. Weber
- C. Henry
- D. Ampere
77. The phenomenon of 'magnetic hysteresis' is observed in:
- A. Diamagnetic materials
- B. Paramagnetic materials
- C. Ferromagnetic materials
- D. All materials
78. The relative permeability of a diamagnetic material is:
- A. Slightly greater than 1
- B. Slightly less than 1
- C. Much greater than 1
- D. Much less than 1
79. The relative permeability of a paramagnetic material is:
- A. Slightly greater than 1
- B. Slightly less than 1
- C. Much greater than 1
- D. Much less than 1
80. The total energy stored in a static electric field is given by:
- A. ½∫ εE² dV
- B. ½∫ μH² dV
- C. ∫ E ⋅ D dV
- D. ∫ H ⋅ B dV
81. The total energy stored in a static magnetic field is given by:
- A. ½∫ εE² dV
- B. ½∫ μH² dV
- C. ∫ E ⋅ D dV
- D. ∫ H ⋅ B dV
82. The reciprocity theorem in electromagnetics relates to:
- A. Source and field interchangeability
- B. Power conservation
- C. Energy storage
- D. Wave propagation
83. The radiation resistance of an antenna is a fictitious resistance that accounts for the:
- A. Power radiated
- B. Losses in the antenna
- C. Input impedance
- D. Efficiency
84. The efficiency of an antenna is the ratio of:
- A. Radiated power to input power
- B. Input power to radiated power
- C. Input power to dissipated power
- D. Radiated power to dissipated power

« Prev 1 2 3 4 5 6 7 8 9 Next »

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

73. The input impedance of a lossless transmission line terminated with a short circuit repeats every ________ wavelength.

74. The boundary condition for the normal component of the magnetic flux density at the interface between two media is that it is:

75. The magnetic vector potential A is related to the magnetic flux density B by:

76. The unit of magnetic flux is:

77. The phenomenon of 'magnetic hysteresis' is observed in:

78. The relative permeability of a diamagnetic material is:

79. The relative permeability of a paramagnetic material is:

80. The total energy stored in a static electric field is given by:

81. The total energy stored in a static magnetic field is given by:

82. The reciprocity theorem in electromagnetics relates to:

83. The radiation resistance of an antenna is a fictitious resistance that accounts for the:

84. The efficiency of an antenna is the ratio of:

Quick Links