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The phase velocity of a wave with frequency of 15 radian/sec and group phase constant of 2 units is

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in Electromagnetic Theory by (188k points)
The phase velocity of a wave with frequency of 15 radian/sec and group phase constant of 2 units is

(a) 30

(b) 15

(c) 7.5

(d) 2/15

The question was asked in an international level competition.

Question is from Properties of Waveguides topic in chapter Waveguides of Electromagnetic Theory

1 Answer

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Best answer
Correct choice is (c) 7.5

Easy explanation: The phase velocity of a wave is given by Vp = ω/βg. on substituting for ω = 15 and βg = 2, we get phase velocity as 15/2 = 7.5 units.

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