The modes in a rectangular waveguide are denoted by TE

_{mn}/TM_{mn}where m and n are the eigen numbers along the larger and smaller dimensions of the waveguide respectively. Which one of the following statements is TRUE?
(A) The TM

_{10}mode of the wave does not exist
(B) The TE

_{10}mode of the wave does not exist
(C) The TM

_{10}_{ }and the TE_{10}modes both exist and have the same cut-off
frequencies

(D) The TM

_{10}and TM_{10}_{ }modes both exist and have the same cut-off frequencies
## 8 comments:

a

the only tm11 mode is the dominant one,but in te case te10,te01 possible.

boath te10 and te 01 exist with same cut off frequency

A

ans C

STILL SOME OF THEM CONFUSING GUYS! THE CORRECT OPTION IS ""A"" BECAUSE TM(base)10 DOES'NT EXIST IN RECTANGULAR WAVE GUIDE AND TE(base)10 IS THE DOMINANT ONE.

a

A

A

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