18. (5%) In an air-filled metallic rectangular waveguide, which of the following will be the most likely answer for the fundamental mode? (A) (B) (C) (D) TEM

1. (5%) A cylindrical capacitor consists of an inner conductor of radius a, and an outer conductor whose inner radius is b. The space between the conductors is filled with a dielectric of permittivity ε. The length of the capacitor is L. The capacitance of this this capacitor is (A) C=2πεL/ln(b/a) (B) C=2πεL/In(a/b)(C)C=2πεL/In(ab) (D) none of the mentioned

18. (5%) In an air-filled metallic rectangular waveguide, which of the following will be the most likely answer for the fundamental mode?
(A)
(B)
(C)
(D) TEM

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