Official PYQ · 2015Set 1 · Q53Transmission LinesMCQ2 marks

GATE EC 2015 Set 1 Q53 — Transmission Lines

The longitudinal component of the magnetic field inside an air-filled rectangular waveguide made of a perfect electric conductor is given by the following expression $H_z (x,y,z,t) = 0.1 \: cos(25 \pi x) \: \: \cos(30.3 \: \pi y) \: \: \cos(12 \pi \times 10^9 t- \beta z) \: \: (A/m)$

The cross-sectional dimensions of the waveguide are give as $a=0.08 \: m$ and $b=0.033 \: m$ . The mode of propagation inside the waveguide is

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Answer: C

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Published 10 Oct 2026

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