16. A plane electromagnetic wave is incident from air onto the surface of a dielectric medium. The dielectric medium is lossless, nonmagnetic and has a relative permittivity εr of 2.25. Assume the angle of incidence is 30°. Which one of the following is closest to the angle of refraction? (A) 36° (B) 19° (C) 23° (D) 12°

16. A plane electromagnetic wave is incident from air onto the surface of a dielectric medium. The dielectric medium is lossless, nonmagnetic and has a relative permittivity ε_rof 2.25. Assume the angle of incidence is 30°. Which one of the following is closest to the angle of refraction?
(A) 36°
(B) 19°
(C) 23°
(D) 12°

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B1 · 2026/10/01

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考試觀念本題測驗兩個核心觀念：電磁...

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20. A transmission line with the transmission line parameters R,G,L,C, has a length ℓ. The transmission line is terminated by a load with a complex impedance RL+jXL. Assume that a DC voltage source V₀ is connected at the input end of the line, and all parameters are known at zero frequency. Consider the following four cases: (1) R＝G＝0, (2) R≠0, G＝0, (3) R＝0, G≠0, (4) R≠0, G≠0. If we are calculating the steady state power dissipated by the load, which of the descriptions below is correct? (A) All cases have the same values. (B) Three of the cases have the same values. (C) Two of the cases have the same values. (D) None of the above

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