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Wave Propagation MCQs

Practice Wave Propagation MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1
Electromagnetic TheoryWave Propagation

The attenuation constant alpha is commonly measured in?

  • ANp/m
  • Brad/m
  • CHz/m
  • DWb/m
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Correct Answer: A. Np/m
Explanation: The attenuation constant describes exponential amplitude decay and is measured in nepers per metre.
Reference: Standard electromagnetic theory: wave propagation
Question 2
Electromagnetic TheoryWave Propagation

The phase constant beta is commonly measured in?

  • Arad/m
  • BNp/m
  • CS/m
  • DC/m
Report an error
Correct Answer: A. rad/m
Explanation: The phase constant describes phase change per unit distance and is measured in radians per metre.
Reference: Standard electromagnetic theory: wave propagation
Question 4
Electromagnetic TheoryWave Propagation

The phase constant beta and wavelength lambda are related by?

  • Abeta = 2 pi/lambda
  • Bbeta = lambda/(2 pi)
  • Cbeta = 2 pi lambda
  • Dbeta = 1/lambda²
Report an error
Correct Answer: A. beta = 2 pi/lambda
Explanation: A phase change of 2π radians occurs over one wavelength, hence β=2π/λ.
Reference: Standard electromagnetic theory: wave propagation
Question 6
Electromagnetic TheoryWave Propagation

The complex propagation constant gamma is conventionally written as?

  • Aalpha + j beta
  • Bbeta + j alpha only
  • Calpha beta
  • Dj(alpha + beta)
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Correct Answer: A. alpha + j beta
Explanation: The propagation constant is γ=α+jβ, where α is attenuation constant and β is phase constant.
Reference: Standard electromagnetic theory: wave propagation
Question 7
Antenna & Wave PropagationWave Propagation

Ground-wave propagation is most useful at relatively?

  • ALow frequencies
  • BOnly optical frequencies
  • COnly millimeter-wave frequencies
  • DX-ray frequencies
Report an error
Correct Answer: A. Low frequencies
Explanation: Ground waves can follow Earth's surface effectively at lower frequencies, with losses increasing as frequency rises.
Reference: Standard antenna and wave propagation: wave propagation