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BEE Bachelor of Electrical Engineering Electromagnetic Fields and Waves Questions and Answers Flashcards

6 cards from real BEE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 BEE Bachelor of Electrical Engineering Electromagnetic Fields and Waves Questions and Answers flashcards as text

  1. What is the divergence of the magnetic flux density B in free space according to Maxwell's equations?

    Answer: Always zero

    Gauss's law for magnetism states that the divergence of B is always zero, confirming that magnetic monopoles do not exist.

  2. A uniform plane wave propagates in the +z direction in a lossless medium with relative permittivity 4 and relative permeability 1. What is the phase velocity of the wave?

    Answer: 1.5 × 10⁸ m/s

    Phase velocity is c/√(εᵣμᵣ) = 3×10⁸/√4 = 1.5 × 10⁸ m/s.

  3. Which boundary condition holds for the tangential component of the electric field at an interface between two perfect dielectrics?

    Answer: It is continuous across the boundary

    The tangential component of E is always continuous across the interface between two dielectrics with no surface charges.

  4. In a parallel plate capacitor with plate separation d and voltage V, what is the magnitude of the uniform electric field between the plates?

    Answer: V/d

    For a parallel plate capacitor, the uniform electric field magnitude is simply E = V/d.

  5. What does the Poynting vector represent in electromagnetic theory?

    Answer: The direction and magnitude of power flow per unit area

    The Poynting vector S = E × H gives the instantaneous power flow per unit area in the direction of wave propagation.

  6. A 10 GHz electromagnetic wave travels through free space. What is its wavelength?

    Answer: 3 cm

    Wavelength λ = c/f = 3×10⁸/10×10⁹ = 0.03 m = 3 cm.