AllInfoHub – MCQ Practice

Electromagnetics – Multiple Choice Questions (MCQs)

61. The wave impedance of free space is approximately:
- A. 377 ohms
- B. 120 ohms
- C. 75 ohms
- D. 50 ohms
62. A uniform plane wave in free space is a _______ wave.
- A. Longitudinal
- B. Transverse
- C. Surface
- D. Standing
63. Which of the following materials is diamagnetic?
- A. Copper
- B. Aluminum
- C. Iron
- D. Nickel
64. The capacitance per unit length of a coaxial cable depends on:
- A. Its length only
- B. The radii of the inner and outer conductors
- C. The material of the conductors
- D. The frequency of operation
65. The electric potential inside a charged conducting sphere is:
- A. Zero
- B. Constant and equal to the potential on its surface
- C. Varies linearly with distance from center
- D. Varies inversely with distance from center
66. 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
67. The divergence of the electric field D is equal to:
- A. Charge density ρv
- B. Current density J
- C. Magnetic flux density B
- D. Zero
68. The radiation resistance of a small current element is proportional to:
- A. Length of the element
- B. Square of the length of the element
- C. Current flowing through the element
- D. Frequency
69. Which of the following is used to measure the impedance of a transmission line?
- A. Spectrum analyzer
- B. Oscilloscope
- C. Vector network analyzer
- D. Multimeter
70. The critical angle is associated with:
- A. Total internal reflection
- B. Refraction
- C. Diffraction
- D. Interference
71. The electric field at the surface of a conductor is always:
- A. Parallel to the surface
- B. Perpendicular to the surface
- C. Zero
- D. Constant
72. The concept of self-inductance is based on:
- A. Lenz's Law
- B. Faraday's Law
- C. Ampere's Law
- D. Both Lenz's and Faraday's Law

« Prev 1 2 3 4 5 6 7 8 Next »

Electromagnetics – Multiple Choice Questions (MCQs)

61. The wave impedance of free space is approximately:

62. A uniform plane wave in free space is a _______ wave.

63. Which of the following materials is diamagnetic?

64. The capacitance per unit length of a coaxial cable depends on:

65. The electric potential inside a charged conducting sphere is:

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

67. The divergence of the electric field D is equal to:

68. The radiation resistance of a small current element is proportional to:

69. Which of the following is used to measure the impedance of a transmission line?

70. The critical angle is associated with:

71. The electric field at the surface of a conductor is always:

72. The concept of self-inductance is based on:

Quick Links