A rectangular metal waveguide filled with a dielectric of relative permittivity εr = 4, has the inside dimensions 3 x 1.2 cm, the cut off frequency for the dominant mode is

1. 

A rectangular metal waveguide filled with a dielectric of relative permittivity εr = 4, has the inside dimensions 3 x 1.2 cm, the cut off frequency for the dominant mode is
[A]. 2.5 GHz
[B]. 5 GHz
[C]. 10 GHz
[D]. 12.5 GHz

Answer: Option B

Explanation:

215-220-1for dominant mode.

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