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

25. A uniform plane wave propagating in a lossless dielectric medium is a ________ wave.
- A. Longitudinal
- B. Transverse
- C. Surface
- D. Standing
26. Transmission lines are used to transfer energy from:
- A. High frequency to low frequency
- B. Low frequency to high frequency
- C. Source to load
- D. Load to source
27. The characteristic impedance of a lossless transmission line is given by:
- A. √(L/C)
- B. √(C/L)
- C. L/C
- D. C/L
28. A perfectly matched transmission line has a voltage standing wave ratio (VSWR) of:
- A. 0
- B. 1
- C. Infinity
- D. 0.5
29. The reflection coefficient for an open circuit on a transmission line is:
- A. 1
- B. -1
- C. 0
- D. Infinity
30. An antenna is a device that converts:
- A. Electrical energy into mechanical energy
- B. Mechanical energy into electrical energy
- C. Guided waves into space waves and vice-versa
- D. Space waves into guided waves
31. The radiation pattern of an isotropic antenna is a:
- A. Figure-eight
- B. Sphere
- C. Doughnut
- D. Hemisphere
32. The directivity of an antenna is a measure of its ability to:
- A. Transmit in all directions
- B. Receive signals from all directions
- C. Concentrate radiated power in a particular direction
- D. Minimize losses
33. The half-power beamwidth (HPBW) of an antenna is the angular width between the points where the radiation intensity is ________ its maximum value.
- A. Half
- B. Double
- C. Zero
- D. One-fourth
34. What is the unit of electric potential?
- A. Volt
- B. Coulomb
- C. Farad
- D. Joule
35. The electric flux density D and electric field E are related by:
- A. D = εE
- B. E = εD
- C. D = μE
- D. E = μD
36. Poisson's equation relates electric potential V to:
- A. Charge density ρv
- B. Electric field E
- C. Magnetic field H
- D. Current density J

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

25. A uniform plane wave propagating in a lossless dielectric medium is a ________ wave.

26. Transmission lines are used to transfer energy from:

27. The characteristic impedance of a lossless transmission line is given by:

28. A perfectly matched transmission line has a voltage standing wave ratio (VSWR) of:

29. The reflection coefficient for an open circuit on a transmission line is:

30. An antenna is a device that converts:

31. The radiation pattern of an isotropic antenna is a:

32. The directivity of an antenna is a measure of its ability to:

33. The half-power beamwidth (HPBW) of an antenna is the angular width between the points where the radiation intensity is ________ its maximum value.

34. What is the unit of electric potential?

35. The electric flux density D and electric field E are related by:

36. Poisson's equation relates electric potential V to:

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