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Electromagnetics –
Medium Difficulty
ARE YOU READY?
LET’S PRACTICE!
#1. Maxwell’s equations include:
#2. The magnetic force on a current-carrying wire is:
#3. The time-average Poynting vector for sinusoidal fields is:
#4. The magnetic field inside a long solenoid is:
#5. When a wave passes from medium 1 to medium 2 with η₂ > η₁:
#6. The energy stored in an inductor is:
#7. The radiation resistance of a half-wave dipole is approximately:
#8. A quarter-wave transformer transforms impedance according to:
#9. Capacitance of a parallel plate capacitor is C =:
#10. The boundary condition for normal D at interface is:
#11. Gauss’s law relates electric flux to:
#12. Electromagnetic waves travel at speed:
#13. In a dispersive medium:
#14. The energy stored in a capacitor is:
#15. Antenna gain is measured in:
#16. A transmission line is matched when:
#17. The phase velocity of a wave in a medium with εr = 4 is:
#18. Lenz’s law states that induced current:
#19. The Hertzian dipole (short dipole) far-field E varies as:
#20. Standing wave ratio (SWR) is related to Γ by:
#21. For a short-circuited line (ZL = 0), Γ =:
#22. Polarization mismatch between antennas causes:
#23. For a uniform plane wave, the ratio E/H equals:
#24. The magnetic force on a moving charge is:
#25. The method of moments (MoM) is used for:
#26. Circular polarization means E-field:
#27. The characteristic impedance of a transmission line depends on:
#28. The finite element method (FEM) in EM is used for:
#29. The wavelength λ and frequency f of a wave are related by:
#30. The boundary condition for tangential H is:
#31. The relationship between E and V is:
#33. The reflection coefficient Γ is:
#34. The Q factor of a cavity resonator is typically:
#35. Linear polarization means E-field:
#36. Mutual inductance between two coils depends on:
#37. The critical angle for total internal reflection is:
#38. For a lossless transmission line, Zin repeats every:
#39. The intrinsic impedance of free space is:
#40. Perfect coupling between two coils means k =:
#41. The wave equation for E in free space is:
#42. In a good conductor, the attenuation constant α equals:
#43. The Poynting vector represents:
#44. Ampere’s law relates:
#45. The propagation constant γ for a lossy medium is:
#46. Waveguides support propagation only above:
#47. The Biot-Savart law describes:
#48. At high frequencies, current in conductors flows:
#49. For an open-circuited line (ZL = ∞), Γ =:
#50. Brewster’s angle is the angle at which:
#51. The electric field inside a conductor in electrostatic equilibrium is:
#52. Total internal reflection occurs when:
#53. The electric field at the surface of a conductor is:
#54. The cutoff wavelength for TE10 mode in rectangular waveguide is:
#55. Retarded potentials account for:
#56. The group velocity represents:
#57. TEM mode can exist in:
#58. Faraday’s law of induction states:
#59. The far-field (Fraunhofer) region begins at distance:
#60. The displacement current term added by Maxwell accounts for:
#61. The Friis transmission equation relates:
#62. Relative permeability μr for ferromagnetic materials is:
#63. The electric scalar potential V and vector potential A relate to E by:
#64. The magnetic vector potential A is defined by:
#65. For a horizontal electric dipole above a perfect conductor, the image is:
#66. The VSWR for a matched load is:
#67. The penetration depth (skin depth) δ in copper at 1 MHz is approximately:
#68. The radiation resistance of a short dipole is:
#69. The inductance of a coil is defined as:
#70. The boundary condition for normal B is:
#71. The polarization P of a dielectric is:
#72. Charges on a conductor reside:
#73. The relationship between D, E, and P is:
#74. Dielectric constant (relative permittivity) εr is:
#75. Skin depth in conductors:
#76. The image theory replaces:
#77. The electric potential V is measured in:
#78. The dominant mode in rectangular waveguide is:
#79. The electric field E is defined as:
#81. The Smith chart is used for:
#82. The electric susceptibility χe relates P to E by:
#83. The electric field inside a cavity resonator at resonance:
#84. Relative permeability μr for diamagnetic materials is:
#85. Near-field of a dipole varies as:
#86. The boundary condition for tangential E at interface is:
#87. For a plane wave, E and H are:
#88. Coulomb’s law describes the force between:
#89. The power radiated by an antenna is proportional to:
#90. Single-stub matching can achieve match with:
#91. The electric field inside a conductor at equilibrium is:
#92. Gauss’s law relates electric flux to:
#93. The unit of magnetic flux density B is:
#94. Faraday’s law states that EMF is proportional to:
#95. The speed of electromagnetic waves in free space is:
#96. The characteristic impedance of free space η₀ is approximately:
#97. A transmission line with matched load has VSWR of:
#98. The skin depth in a conductor _____ with frequency:
#99. Lenz’s law states that induced EMF opposes:
#100. The divergence of magnetic field B is:
