A rectangular metal waveguide filled with a dielectric of relative per – McqOptions

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1.	A rectangular metal waveguide filled with a dielectric of relative permittivity _r = 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» C. 10 GHz

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