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Electromagnetic Field Theory - Engineering

Q1:

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

ANS:B - 5 GHz

for dominant mode.