25 GATE Question Of The Day – Electromagnetics

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 TM₁₀ mode of the wave does not exist

(B) The TE₁₀ mode of the wave does not exist

(C) The TM₁₀ and the TE₁₀ modes both exist and have the same cut-off

      frequencies

(D) The TM₁₀ and TM₁₀ modes both exist and have the same cut-off frequencies