The cut off frequency of the dominant mode in a TE wave in the line having a and b as 2.5 cm and 1 cm respectively is(a) 4.5 GHz(b) 5 GHz(c) 5.5 GHz(d) 6 GHzI have been asked this question by my college director while I was bunking the class.My question is based upon Cut-off Frequency and Wavelength topic in division Waveguides of Electromagnetic Theory

The cut off frequency of the dominant mode in a TE wave in the line ha

1.	The cut off frequency of the dominant mode in a TE wave in the line having a and b as 2.5 cm and 1 cm respectively is(a) 4.5 GHz(b) 5 GHz(c) 5.5 GHz(d) 6 GHzI have been asked this question by my college director while I was bunking the class.My question is based upon Cut-off Frequency and Wavelength topic in division Waveguides of Electromagnetic Theory
Answer» Right option is (d) 6 GHz The BEST I can explain: The dominant mode in TE is TE10. The CUT off frequency will be mc/2a, where m = 1 and a = 0.025 are GIVEN. On substituting, we get the frequency as 1 x 3 x 10^8/2 x 0.025 = 6 GHz.

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