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GATE EC 2019 Set 1 — Question 47

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MCQ+2 / -0.67EasyPhase & Group VelocityPlane WavesElectromagnetics

Electromagnetics → Plane Waves → Phase & Group Velocity

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The dispersion equation of a waveguide, which relates the wavenumber kk to the frequency ω\omega, isk(ω)=(1/c)ω2−ω02k(\omega) = (1/c)\sqrt{\omega^2 - \omega_0^2}where the speed of light c=3×108c = 3 \times 10^8 m/s, and ω0\omega_0 is a constant. If the group velocity is 2×1082 \times 10^8 m/s, then the phase velocity is
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