GATE EC 2002 Electromagnetics Solution Q 6

GATE EC 2002 Electromagnetics Solution Q 6

The phase velocity for the TE10 mode in an air-filled rectangular waveguide is __.

a) less than c

b) equal to c

c) greater than c

d) none of the above

Ans-(c)

Explanation

v_p=\frac c{\sqrt{1-\left({\displaystyle\frac{f_c}f}\right)^2}}

By observing the equation we can easily confer that the phase velocity is greater than c as denominator is less than 1.

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