Question

The phase velocity of a wave having a phase constant of 4 units and a frequency of 2.5 x 10^9 radian/sec is (in 10^8 order) (a) 3.25 (b) 3.75 (c) 6.25 (d) 6.75 The question was posed to me during a job interview. This is a very interesting question from Phase and Group Velocity in section Waveguides of Electromagnetic Theory Select the correct answer from above options Electromagnetic Theory questions and answers, Electromagnetic Theory questions pdf, Electromagnetic Theory question bank, Electromagnetic Theory questions and answers pdf, mcq on Electromagnetic Theory pdf,electromagnetic theory book pdf,electromagnetic theory pdf notes,electromagnetic theory lecture notes,electromagnetic theory of light,maxwell electromagnetic theory,electromagnetic theory proposed by,electromagnetic theory engineering physics,electromagnetic theory nptel

Answer 1

Right option is (c) 6.25 The explanation is: The phase velocity and the phase constant are related by Vp = ω/βg. On substituting for ω = 2.5 x 10^9 and β = 4, we get the phase velocity as 6.25 units.