GATE EC 2015 Set 1 — Question 63
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Electromagnetics → Waveguides & Optical Fibers → Rectangular & Circular Waveguides
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Question
The longitudinal component of the magnetic field inside an air-filled rectangular waveguide made of a perfect electric conductor is given by the following expressionThe cross-sectional dimensions of the waveguide are given as and . The mode of propagation inside the waveguide is
Correct answer
(C) TE₂₁
Solution
For a rectangular waveguide, the longitudinal magnetic field for modes is given by the general form:Comparing the given expression with the standard form:
1..
2..
Since is non-zero, the mode must be a Transverse Electric () mode. For modes, . Therefore, the mode of propagation is .Continue learning with Success Tracker
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